/*
 * backend.c -- Common back end for X and Windows NT versions of
 *
 * Copyright 1991 by Digital Equipment Corporation, Maynard,
 * Massachusetts.
 *
 * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
 * 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Free
 * Software Foundation, Inc.
 *
 * Enhancements Copyright 2005 Alessandro Scotti
 *
 * The following terms apply to Digital Equipment Corporation's copyright
 * interest in XBoard:
 * ------------------------------------------------------------------------
 * All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of Digital not be
 * used in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 *
 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 * ------------------------------------------------------------------------
 *
 * The following terms apply to the enhanced version of XBoard
 * distributed by the Free Software Foundation:
 * ------------------------------------------------------------------------
 *
 * GNU XBoard is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * GNU XBoard is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see http://www.gnu.org/licenses/.  *
 *
 *------------------------------------------------------------------------
 ** See the file ChangeLog for a revision history.  */

/* [AS] Also useful here for debugging */
#ifdef WIN32
#include <windows.h>

int flock(int f, int code);
#   define LOCK_EX 2
#   define SLASH '\\'

#   ifdef ARC_64BIT
#       define EGBB_NAME "egbbdll64.dll"
#   else
#       define EGBB_NAME "egbbdll.dll"
#   endif

#else

#   include <sys/file.h>
#   define SLASH '/'

#   include <dlfcn.h>
#   ifdef ARC_64BIT
#       define EGBB_NAME "egbbso64.so"
#   else
#       define EGBB_NAME "egbbso.so"
#   endif
// kludge to allow Windows code in back-end by converting it to corresponding Linux code 
#   define CDECL
#   define HMODULE void *
#   define LoadLibrary(x) dlopen(x, RTLD_LAZY)
#   define GetProcAddress dlsym

#endif

#include "config.h"

#include <assert.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <math.h>
#include <ctype.h>

#if STDC_HEADERS
# include <stdlib.h>
# include <string.h>
# include <stdarg.h>
#else /* not STDC_HEADERS */
# if HAVE_STRING_H
#  include <string.h>
# else /* not HAVE_STRING_H */
#  include <strings.h>
# endif /* not HAVE_STRING_H */
#endif /* not STDC_HEADERS */

#if HAVE_SYS_FCNTL_H
# include <sys/fcntl.h>
#else /* not HAVE_SYS_FCNTL_H */
# if HAVE_FCNTL_H
#  include <fcntl.h>
# endif /* HAVE_FCNTL_H */
#endif /* not HAVE_SYS_FCNTL_H */

#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#if defined(_amigados) && !defined(__GNUC__)
struct timezone {
  int tz_minuteswest;
  int tz_dsttime;
};
extern int gettimeofday(struct timeval *, struct timezone *);
#endif

#if HAVE_UNISTD_H
# include <unistd.h>
#endif

#include "common.h"
#include "frontend.h"
#include "backend.h"
#include "parser.h"
#include "moves.h"
#if ZIPPY
# include "zippy.h"
#endif
#include "backendz.h"
#include "evalgraph.h"
#include "engineoutput.h"
#include "gettext.h"

#ifdef ENABLE_NLS
# define _(s) gettext (s)
# define N_(s) gettext_noop (s)
# define T_(s) gettext(s)
#else
# ifdef WIN32
#   define _(s) T_(s)
#   define N_(s) s
# else
#   define _(s) (s)
#   define N_(s) s
#   define T_(s) s
# endif
#endif


int establish P((void));
void read_from_player P((InputSourceRef isr, VOIDSTAR closure,
      char *buf, int count, int error));
void read_from_ics P((InputSourceRef isr, VOIDSTAR closure,
      char *buf, int count, int error));
void SendToICS P((char *s));
void SendToICSDelayed P((char *s, long msdelay));
void SendMoveToICS P((ChessMove moveType, int fromX, int fromY, int toX, int toY, char promoChar));
void HandleMachineMove P((char *message, ChessProgramState *cps));
int AutoPlayOneMove P((void));
int LoadGameOneMove P((ChessMove readAhead));
int LoadGameFromFile P((char *filename, int n, char *title, int useList));
int LoadPositionFromFile P((char *filename, int n, char *title));
int SavePositionToFile P((char *filename));
void MakeMove P((int fromX, int fromY, int toX, int toY, int promoChar));
void ShowMove P((int fromX, int fromY, int toX, int toY));
int FinishMove P((ChessMove moveType, int fromX, int fromY, int toX, int toY,
      /*char*/int promoChar));
void BackwardInner P((int target));
void ForwardInner P((int target));
int Adjudicate P((ChessProgramState *cps));
void GameEnds P((ChessMove result, char *resultDetails, int whosays));
void EditPositionDone P((Boolean fakeRights));
void PrintOpponents P((FILE *fp));
void PrintPosition P((FILE *fp, int move));
void SendToProgram P((char *message, ChessProgramState *cps));
void SendMoveToProgram P((int moveNum, ChessProgramState *cps));
void ReceiveFromProgram P((InputSourceRef isr, VOIDSTAR closure,
      char *buf, int count, int error));
void SendTimeControl P((ChessProgramState *cps,
      int mps, long tc, int inc, int sd, int st));
char *TimeControlTagValue P((void));
void Attention P((ChessProgramState *cps));
void FeedMovesToProgram P((ChessProgramState *cps, int upto));
int ResurrectChessProgram P((void));
void DisplayComment P((int moveNumber, char *text));
void DisplayMove P((int moveNumber));

void ParseGameHistory P((char *game));
void ParseBoard12 P((char *string));
void KeepAlive P((void));
void StartClocks P((void));
void SwitchClocks P((int nr));
void StopClocks P((void));
void ResetClocks P((void));
char *PGNDate P((void));
void SetGameInfo P((void));
int RegisterMove P((void));
void MakeRegisteredMove P((void));
void TruncateGame P((void));
int looking_at P((char *, int *, char *));
void CopyPlayerNameIntoFileName P((char **, char *));
char *SavePart P((char *));
int SaveGameOldStyle P((FILE *));
int SaveGamePGN P((FILE *));
int CheckFlags P((void));
long NextTickLength P((long));
void CheckTimeControl P((void));
void show_bytes P((FILE *, char *, int));
int string_to_rating P((char *str));
void ParseFeatures P((char* args, ChessProgramState *cps));
void InitBackEnd3 P((void));
void FeatureDone P((ChessProgramState* cps, int val));
void InitChessProgram P((ChessProgramState *cps, int setup));
void OutputKibitz(int window, char *text);
int PerpetualChase(int first, int last);
int EngineOutputIsUp();
void InitDrawingSizes(int x, int y);
void NextMatchGame P((void));
int NextTourneyGame P((int nr, int *swap));
int Pairing P((int nr, int nPlayers, int *w, int *b, int *sync));
FILE *WriteTourneyFile P((char *results, FILE *f));
void DisplayTwoMachinesTitle P(());
static void ExcludeClick P((int index));
void ToggleSecond P((void));
void PauseEngine P((ChessProgramState *cps));
static int NonStandardBoardSize P((VariantClass v, int w, int h, int s));

#ifdef WIN32
extern void ConsoleCreate();
#endif

ChessProgramState *WhitePlayer();
int VerifyDisplayMode P(());

char *GetInfoFromComment( int, char * ); // [HGM] PV time: returns stripped comment
void InitEngineUCI( const char * iniDir, ChessProgramState * cps ); // [HGM] moved here from winboard.c
char *ProbeBook P((int moveNr, char *book)); // [HGM] book: returns a book move
char *SendMoveToBookUser P((int nr, ChessProgramState *cps, int initial)); // [HGM] book
void ics_update_width P((int new_width));
extern char installDir[MSG_SIZ];
VariantClass startVariant; /* [HGM] nicks: initial variant */
Boolean abortMatch;
int deadRanks;

extern int tinyLayout, smallLayout;
ChessProgramStats programStats;
char lastPV[2][2*MSG_SIZ]; /* [HGM] pv: last PV in thinking output of each engine */
int endPV = -1;
static int exiting = 0; /* [HGM] moved to top */
static int setboardSpoiledMachineBlack = 0 /*, errorExitFlag = 0*/;
int startedFromPositionFile = FALSE; Board filePosition;       /* [HGM] loadPos */
Board partnerBoard;     /* [HGM] bughouse: for peeking at partner game          */
int partnerHighlight[2];
Boolean partnerBoardValid = 0;
char partnerStatus[MSG_SIZ];
Boolean partnerUp;
Boolean originalFlip;
Boolean twoBoards = 0;
char endingGame = 0;    /* [HGM] crash: flag to prevent recursion of GameEnds() */
int whiteNPS, blackNPS; /* [HGM] nps: for easily making clocks aware of NPS     */
VariantClass currentlyInitializedVariant; /* [HGM] variantswitch */
int lastIndex = 0;      /* [HGM] autoinc: last game/position used in match mode */
Boolean connectionAlive;/* [HGM] alive: ICS connection status from probing      */
int opponentKibitzes;
int lastSavedGame; /* [HGM] save: ID of game */
char chatPartner[MAX_CHAT][MSG_SIZ]; /* [HGM] chat: list of chatting partners */
extern int chatCount;
int chattingPartner;
char marker[BOARD_RANKS][BOARD_FILES]; /* [HGM] marks for target squares */
char legal[BOARD_RANKS][BOARD_FILES];  /* [HGM] legal target squares */
char lastMsg[MSG_SIZ];
char lastTalker[MSG_SIZ];
ChessSquare pieceSweep = EmptySquare;
ChessSquare promoSweep = EmptySquare, defaultPromoChoice;
int promoDefaultAltered;
int keepInfo = 0; /* [HGM] to protect PGN tags in auto-step game analysis */
static int initPing = -1;
int border;       /* [HGM] width of board rim, needed to size seek graph  */
char bestMove[MSG_SIZ], avoidMove[MSG_SIZ];
int solvingTime, totalTime;

/* States for ics_getting_history */
#define H_FALSE 0
#define H_REQUESTED 1
#define H_GOT_REQ_HEADER 2
#define H_GOT_UNREQ_HEADER 3
#define H_GETTING_MOVES 4
#define H_GOT_UNWANTED_HEADER 5

/* whosays values for GameEnds */
#define GE_ICS 0
#define GE_ENGINE 1
#define GE_PLAYER 2
#define GE_FILE 3
#define GE_XBOARD 4
#define GE_ENGINE1 5
#define GE_ENGINE2 6

/* Maximum number of games in a cmail message */
#define CMAIL_MAX_GAMES 20

/* Different types of move when calling RegisterMove */
#define CMAIL_MOVE   0
#define CMAIL_RESIGN 1
#define CMAIL_DRAW   2
#define CMAIL_ACCEPT 3

/* Different types of result to remember for each game */
#define CMAIL_NOT_RESULT 0
#define CMAIL_OLD_RESULT 1
#define CMAIL_NEW_RESULT 2

/* Telnet protocol constants */
#define TN_WILL 0373
#define TN_WONT 0374
#define TN_DO   0375
#define TN_DONT 0376
#define TN_IAC  0377
#define TN_ECHO 0001
#define TN_SGA  0003
#define TN_PORT 23

char* safeStrCpy (char *dst, const char *src, size_t count)
{ // [HGM] made safe
  int i;
  assert( dst != NULL );
  assert( src != NULL );
  assert( count > 0 );

  for(i=0; i<count; i++) if((dst[i] = src[i]) == NULLCHAR) break;
  if(  i == count && dst[count-1] != NULLCHAR)
  {
    dst[ count-1 ] = '\0'; // make sure incomplete copy still null-terminated
    if(appData.debugMode)
      fprintf(debugFP, "safeStrCpy: copying %s into %s didn't work, not enough space %d\n",src,dst, (int)count);
  }

  return dst;
}

/* Some compiler can't cast u64 to double
 * This function do the job for us:

 * We use the highest bit for cast, this only
 * works if the highest bit is not
 * in use (This should not happen)
 *
 * We used this for all compiler
 */
double u64ToDouble (u64 value)
{
  double r;
  u64 tmp = value & u64Const(0x7fffffffffffffff);
  r = (double)(s64)tmp;
  if (value & u64Const(0x8000000000000000))
    r +=  9.2233720368547758080e18; /* 2^63 */
  return r;
}

/* Fake up flags for now, as we aren't keeping track of castling
   availability yet. [HGM] Change of logic: the flag now only
   indicates the type of castlings allowed by the rule of the game.
   The actual rights themselves are maintained in the array
   castlingRights, as part of the game history, and are not probed
   by this function.
   */
int PosFlags (int index)
{
  int flags = F_ALL_CASTLE_OK;
  if ((index % 2) == 0) flags |= F_WHITE_ON_MOVE;
  switch (gameInfo.variant) {
    case VariantSuicide:
      flags &= ~F_ALL_CASTLE_OK;
    case VariantGiveaway:		// [HGM] moved this case label one down: seems Giveaway does have castling on ICC!
      flags |= F_IGNORE_CHECK;
    case VariantLosers:
      flags |= F_MANDATORY_CAPTURE; //[HGM] losers: sets flag so TestLegality rejects non-capts if capts exist
      break;
    case VariantAtomic:
      flags |= F_IGNORE_CHECK | F_ATOMIC_CAPTURE;
      break;
    case VariantKriegspiel:
      flags |= F_KRIEGSPIEL_CAPTURE;
      break;
    case VariantCapaRandom:
    case VariantFischeRandom:
      flags |= F_FRC_TYPE_CASTLING; /* [HGM] enable this through flag */
    case VariantNoCastle:
    case VariantShatranj:
    case VariantCourier:
    case VariantMakruk:
    case VariantASEAN:
    case VariantGrand:
      flags &= ~F_ALL_CASTLE_OK;
      break;
    case VariantChu:
    case VariantChuChess:
    case VariantLion:
      flags |= F_NULL_MOVE;
      break;
    default:
      break;
  }
  if(appData.fischerCastling) flags |= F_FRC_TYPE_CASTLING, flags &= ~F_ALL_CASTLE_OK; // [HGM] fischer
  return flags;
}

FILE *gameFileFP, *debugFP, *serverFP;
char *currentDebugFile; // [HGM] debug split: to remember name

/*
   [AS] Note: sometimes, the sscanf() function is used to parse the input
   into a fixed-size buffer. Because of this, we must be prepared to
   receive strings as long as the size of the input buffer, which is currently
   set to 4K for Windows and 8K for the rest.
   So, we must either allocate sufficiently large buffers here, or
   reduce the size of the input buffer in the input reading part.
   */

char cmailMove[CMAIL_MAX_GAMES][MOVE_LEN], cmailMsg[MSG_SIZ];
char bookOutput[MSG_SIZ*10], thinkOutput[MSG_SIZ*10], lastHint[MSG_SIZ];
char thinkOutput1[MSG_SIZ*10];
char promoRestrict[MSG_SIZ];

ChessProgramState first, second, pairing;

/* premove variables */
int premoveToX = 0;
int premoveToY = 0;
int premoveFromX = 0;
int premoveFromY = 0;
int premovePromoChar = 0;
int gotPremove = 0;
Boolean alarmSounded;
/* end premove variables */

char *ics_prefix = "$";
enum ICS_TYPE ics_type = ICS_GENERIC;

int currentMove = 0, forwardMostMove = 0, backwardMostMove = 0;
int pauseExamForwardMostMove = 0;
int nCmailGames = 0, nCmailResults = 0, nCmailMovesRegistered = 0;
int cmailMoveRegistered[CMAIL_MAX_GAMES], cmailResult[CMAIL_MAX_GAMES];
int cmailMsgLoaded = FALSE, cmailMailedMove = FALSE;
int cmailOldMove = -1, firstMove = TRUE, flipView = FALSE;
int blackPlaysFirst = FALSE, startedFromSetupPosition = FALSE;
int searchTime = 0, pausing = FALSE, pauseExamInvalid = FALSE;
int whiteFlag = FALSE, blackFlag = FALSE;
int userOfferedDraw = FALSE;
int ics_user_moved = 0, ics_gamenum = -1, ics_getting_history = H_FALSE;
int matchMode = FALSE, hintRequested = FALSE, bookRequested = FALSE;
int cmailMoveType[CMAIL_MAX_GAMES];
long ics_clock_paused = 0;
ProcRef icsPR = NoProc, cmailPR = NoProc;
InputSourceRef telnetISR = NULL, fromUserISR = NULL, cmailISR = NULL;
GameMode gameMode = BeginningOfGame;
char moveList[MAX_MOVES][MOVE_LEN], parseList[MAX_MOVES][MOVE_LEN * 2];
char *commentList[MAX_MOVES], *cmailCommentList[CMAIL_MAX_GAMES];
ChessProgramStats_Move pvInfoList[MAX_MOVES]; /* [AS] Info about engine thinking */
int hiddenThinkOutputState = 0; /* [AS] */
int adjudicateLossThreshold = 0; /* [AS] Automatic adjudication */
int adjudicateLossPlies = 6;
char white_holding[64], black_holding[64];
TimeMark lastNodeCountTime;
long lastNodeCount=0;
int shiftKey, controlKey; // [HGM] set by mouse handler

int have_sent_ICS_logon = 0;
int movesPerSession;
int suddenDeath, whiteStartMove, blackStartMove; /* [HGM] for implementation of 'any per time' sessions, as in first part of byoyomi TC */
long whiteTimeRemaining, blackTimeRemaining, timeControl, timeIncrement, lastWhite, lastBlack, activePartnerTime;
Boolean adjustedClock;
long timeControl_2; /* [AS] Allow separate time controls */
char *fullTimeControlString = NULL, *nextSession, *whiteTC, *blackTC, activePartner; /* [HGM] secondary TC: merge of MPS, TC and inc */
long timeRemaining[2][MAX_MOVES];
int matchGame = 0, nextGame = 0, roundNr = 0;
Boolean waitingForGame = FALSE, startingEngine = FALSE;
TimeMark programStartTime, pauseStart;
char ics_handle[MSG_SIZ];
int have_set_title = 0;

/* animateTraining preserves the state of appData.animate
 * when Training mode is activated. This allows the
 * response to be animated when appData.animate == TRUE and
 * appData.animateDragging == TRUE.
 */
Boolean animateTraining;

GameInfo gameInfo;

AppData appData;

Board boards[MAX_MOVES];
/* [HGM] Following 7 needed for accurate legality tests: */
signed char  castlingRank[BOARD_FILES]; // and corresponding ranks
unsigned char initialRights[BOARD_FILES];
int   nrCastlingRights; // For TwoKings, or to implement castling-unknown status
int   initialRulePlies, FENrulePlies;
FILE  *serverMoves = NULL; // next two for broadcasting (/serverMoves option)
int loadFlag = 0;
Boolean shuffleOpenings;
int mute; // mute all sounds

// [HGM] vari: next 12 to save and restore variations
#define MAX_VARIATIONS 10
int framePtr = MAX_MOVES-1; // points to free stack entry
int storedGames = 0;
int savedFirst[MAX_VARIATIONS];
int savedLast[MAX_VARIATIONS];
int savedFramePtr[MAX_VARIATIONS];
char *savedDetails[MAX_VARIATIONS];
ChessMove savedResult[MAX_VARIATIONS];

void PushTail P((int firstMove, int lastMove));
Boolean PopTail P((Boolean annotate));
void PushInner P((int firstMove, int lastMove));
void PopInner P((Boolean annotate));
void CleanupTail P((void));

ChessSquare  FIDEArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackBishop, BlackQueen,
    BlackKing, BlackBishop, BlackKnight, BlackRook }
};

ChessSquare twoKingsArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteKing, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackBishop, BlackQueen,
    BlackKing, BlackKing, BlackKnight, BlackRook }
};

ChessSquare  KnightmateArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteMan, WhiteBishop, WhiteQueen,
    WhiteUnicorn, WhiteBishop, WhiteMan, WhiteRook },
  { BlackRook, BlackMan, BlackBishop, BlackQueen,
    BlackUnicorn, BlackBishop, BlackMan, BlackRook }
};

ChessSquare SpartanArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackAlfil, BlackDragon, BlackKing, BlackTower,
    BlackTower, BlackKing, BlackAngel, BlackAlfil }
};

ChessSquare fairyArray[2][BOARD_FILES] = { /* [HGM] Queen side differs from King side */
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackCardinal, BlackAlfil, BlackMarshall, BlackAngel,
    BlackKing, BlackMarshall, BlackAlfil, BlackCardinal }
};

ChessSquare ShatranjArray[2][BOARD_FILES] = { /* [HGM] (movGen knows about Shatranj Q and P) */
  { WhiteRook, WhiteKnight, WhiteAlfil, WhiteKing,
    WhiteFerz, WhiteAlfil, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackAlfil, BlackKing,
    BlackFerz, BlackAlfil, BlackKnight, BlackRook }
};

ChessSquare makrukArray[2][BOARD_FILES] = { /* [HGM] (movGen knows about Shatranj Q and P) */
  { WhiteRook, WhiteKnight, WhiteMan, WhiteKing,
    WhiteFerz, WhiteMan, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackMan, BlackFerz,
    BlackKing, BlackMan, BlackKnight, BlackRook }
};

ChessSquare aseanArray[2][BOARD_FILES] = { /* [HGM] (movGen knows about Shatranj Q and P) */
  { WhiteRook, WhiteKnight, WhiteMan, WhiteFerz,
    WhiteKing, WhiteMan, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackMan, BlackFerz,
    BlackKing, BlackMan, BlackKnight, BlackRook }
};

ChessSquare  lionArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteLion, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackRook, BlackLion, BlackBishop, BlackQueen,
    BlackKing, BlackBishop, BlackKnight, BlackRook }
};


#if (BOARD_FILES>=10)
ChessSquare ShogiArray[2][BOARD_FILES] = {
  { WhiteQueen, WhiteKnight, WhiteFerz, WhiteWazir,
    WhiteKing, WhiteWazir, WhiteFerz, WhiteKnight, WhiteQueen },
  { BlackQueen, BlackKnight, BlackFerz, BlackWazir,
    BlackKing, BlackWazir, BlackFerz, BlackKnight, BlackQueen }
};

ChessSquare XiangqiArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteAlfil, WhiteFerz,
    WhiteWazir, WhiteFerz, WhiteAlfil, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackAlfil, BlackFerz,
    BlackWazir, BlackFerz, BlackAlfil, BlackKnight, BlackRook }
};

ChessSquare CapablancaArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteAngel, WhiteBishop, WhiteQueen,
    WhiteKing, WhiteBishop, WhiteMarshall, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackAngel, BlackBishop, BlackQueen,
    BlackKing, BlackBishop, BlackMarshall, BlackKnight, BlackRook }
};

ChessSquare GreatArray[2][BOARD_FILES] = {
  { WhiteDragon, WhiteKnight, WhiteAlfil, WhiteGrasshopper, WhiteKing,
    WhiteSilver, WhiteCardinal, WhiteAlfil, WhiteKnight, WhiteDragon },
  { BlackDragon, BlackKnight, BlackAlfil, BlackGrasshopper, BlackKing,
    BlackSilver, BlackCardinal, BlackAlfil, BlackKnight, BlackDragon },
};

ChessSquare JanusArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteAngel, WhiteKnight, WhiteBishop, WhiteKing,
    WhiteQueen, WhiteBishop, WhiteKnight, WhiteAngel, WhiteRook },
  { BlackRook, BlackAngel, BlackKnight, BlackBishop, BlackKing,
    BlackQueen, BlackBishop, BlackKnight, BlackAngel, BlackRook }
};

ChessSquare GrandArray[2][BOARD_FILES] = {
  { EmptySquare, WhiteKnight, WhiteBishop, WhiteQueen, WhiteKing,
    WhiteMarshall, WhiteAngel, WhiteBishop, WhiteKnight, EmptySquare },
  { EmptySquare, BlackKnight, BlackBishop, BlackQueen, BlackKing,
    BlackMarshall, BlackAngel, BlackBishop, BlackKnight, EmptySquare }
};

ChessSquare ChuChessArray[2][BOARD_FILES] = {
  { WhiteMan, WhiteKnight, WhiteBishop, WhiteCardinal, WhiteLion,
    WhiteQueen, WhiteDragon, WhiteBishop, WhiteKnight, WhiteMan },
  { BlackMan, BlackKnight, BlackBishop, BlackDragon, BlackQueen,
    BlackLion, BlackCardinal, BlackBishop, BlackKnight, BlackMan }
};

#ifdef GOTHIC
ChessSquare GothicArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen, WhiteMarshall,
    WhiteKing, WhiteAngel, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackBishop, BlackQueen, BlackMarshall,
    BlackKing, BlackAngel, BlackBishop, BlackKnight, BlackRook }
};
#else // !GOTHIC
#define GothicArray CapablancaArray
#endif // !GOTHIC

#ifdef FALCON
ChessSquare FalconArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteBishop, WhiteFalcon, WhiteQueen,
    WhiteKing, WhiteFalcon, WhiteBishop, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackBishop, BlackFalcon, BlackQueen,
    BlackKing, BlackFalcon, BlackBishop, BlackKnight, BlackRook }
};
#else // !FALCON
#define FalconArray CapablancaArray
#endif // !FALCON

#else // !(BOARD_FILES>=10)
#define XiangqiPosition FIDEArray
#define CapablancaArray FIDEArray
#define GothicArray FIDEArray
#define GreatArray FIDEArray
#endif // !(BOARD_FILES>=10)

#if (BOARD_FILES>=12)
ChessSquare CourierArray[2][BOARD_FILES] = {
  { WhiteRook, WhiteKnight, WhiteAlfil, WhiteBishop, WhiteMan, WhiteKing,
    WhiteFerz, WhiteWazir, WhiteBishop, WhiteAlfil, WhiteKnight, WhiteRook },
  { BlackRook, BlackKnight, BlackAlfil, BlackBishop, BlackMan, BlackKing,
    BlackFerz, BlackWazir, BlackBishop, BlackAlfil, BlackKnight, BlackRook }
};
ChessSquare ChuArray[6][BOARD_FILES] = {
  { WhiteLance, WhiteCat, WhiteCopper, WhiteFerz, WhiteWazir, WhiteKing,
    WhiteAlfil, WhiteWazir, WhiteFerz, WhiteCopper, WhiteCat, WhiteLance },
  { BlackLance, BlackCat, BlackCopper, BlackFerz, BlackWazir, BlackAlfil,
    BlackKing, BlackWazir, BlackFerz, BlackCopper, BlackCat, BlackLance },
  { WhiteAxe, EmptySquare, WhiteBishop, EmptySquare, WhiteClaw, WhiteMarshall,
    WhiteAngel, WhiteClaw, EmptySquare, WhiteBishop, EmptySquare, WhiteAxe },
  { BlackAxe, EmptySquare, BlackBishop, EmptySquare, BlackClaw, BlackAngel,
    BlackMarshall, BlackClaw, EmptySquare, BlackBishop, EmptySquare, BlackAxe },
  { WhiteDagger, WhiteSword, WhiteRook, WhiteCardinal, WhiteDragon, WhiteLion,
    WhiteQueen, WhiteDragon, WhiteCardinal, WhiteRook, WhiteSword, WhiteDagger },
  { BlackDagger, BlackSword, BlackRook, BlackCardinal, BlackDragon, BlackQueen,
    BlackLion, BlackDragon, BlackCardinal, BlackRook, BlackSword, BlackDagger }
};
#else // !(BOARD_FILES>=12)
#define CourierArray CapablancaArray
#define ChuArray CapablancaArray
#endif // !(BOARD_FILES>=12)


Board initialPosition;


/* Convert str to a rating. Checks for special cases of "----",

   "++++", etc. Also strips ()'s */
int string_to_rating (char *str)
{
  while(*str && !isdigit(*str)) ++str;
  if (!*str)
    return 0;	/* One of the special "no rating" cases */
  else
    return atoi(str);
}

void ClearProgramStats ()
{
  /* Init programStats */
  programStats.movelist[0] = 0;
  programStats.depth = 0;
  programStats.nr_moves = 0;
  programStats.moves_left = 0;
  programStats.nodes = 0;
  programStats.time = -1;        // [HGM] PGNtime: make invalid to recognize engine output
  programStats.score = 0;
  programStats.got_only_move = 0;
  programStats.got_fail = 0;
  programStats.line_is_book = 0;
}

void CommonEngineInit ()
{   // [HGM] moved some code here from InitBackend1 that has to be done after both engines have contributed their settings
  if (appData.firstPlaysBlack) {
    first.twoMachinesColor = "black\n";
    second.twoMachinesColor = "white\n";
  } else {
    first.twoMachinesColor = "white\n";
    second.twoMachinesColor = "black\n";
  }

  first.other = &second;
  second.other = &first;

  { float norm = 1;
    if(appData.timeOddsMode) {
      norm = appData.timeOdds[0];
      if(norm > appData.timeOdds[1]) norm = appData.timeOdds[1];
    }
    first.timeOdds  = appData.timeOdds[0]/norm;
    second.timeOdds = appData.timeOdds[1]/norm;
  }

  if(programVersion) free(programVersion);
  if (appData.noChessProgram) {
    programVersion = (char*) malloc(5 + strlen(PACKAGE_STRING));
    sprintf(programVersion, "%s", PACKAGE_STRING);
  } else {
    /* [HGM] tidy: use tidy name, in stead of full pathname (which was probably a bug due to / vs \ ) */
    programVersion = (char*) malloc(8 + strlen(PACKAGE_STRING) + strlen(first.tidy));
    sprintf(programVersion, "%s + %s", PACKAGE_STRING, first.tidy);
  }
}

void UnloadEngine (ChessProgramState *cps)
{
  /* Kill off first chess program */
  if (cps->isr != NULL)
    RemoveInputSource(cps->isr);
  cps->isr = NULL;

  if (cps->pr != NoProc) {
    ExitAnalyzeMode();
    DoSleep( appData.delayBeforeQuit );
    SendToProgram("quit\n", cps);
    DestroyChildProcess(cps->pr, 4 + cps->useSigterm);
  }
  cps->pr = NoProc;
  if(appData.debugMode) fprintf(debugFP, "Unload %s\n", cps->which);
}

void ClearOptions (ChessProgramState *cps)
{
  int i;
  cps->nrOptions = cps->comboCnt = 0;
  for(i=0; i<MAX_OPTIONS; i++) {
    cps->option[i].min = cps->option[i].max = cps->option[i].value = 0;
    cps->option[i].textValue = 0;
  }
}

char *engineNames[] = {
  /* TRANSLATORS: "first" is the first of possible two chess engines. It is inserted into strings
     such as "%s engine" / "%s chess program" / "%s machine" - all meaning the same thing */
  N_("first"),
  /* TRANSLATORS: "second" is the second of possible two chess engines. It is inserted into strings
     such as "%s engine" / "%s chess program" / "%s machine" - all meaning the same thing */
  N_("second")
};

void InitEngine (ChessProgramState *cps, int n)
{   // [HGM] all engine initialiation put in a function that does one engine

  ClearOptions(cps);

  cps->which = engineNames[n];
  cps->maybeThinking = FALSE;
  cps->pr = NoProc;
  cps->isr = NULL;
  cps->sendTime = 2;
  cps->sendDrawOffers = 1;

  cps->program = appData.chessProgram[n];
  cps->host = appData.host[n];
  cps->dir = appData.directory[n];
  cps->initString = appData.engInitString[n];
  cps->computerString = appData.computerString[n];
  cps->useSigint  = TRUE;
  cps->useSigterm = TRUE;
  cps->reuse = appData.reuse[n];
  cps->nps = appData.NPS[n];   // [HGM] nps: copy nodes per second
  cps->useSetboard = FALSE;
  cps->useSAN = FALSE;
  cps->usePing = FALSE;
  cps->lastPing = 0;
  cps->lastPong = 0;
  cps->usePlayother = FALSE;
  cps->useColors = TRUE;
  cps->useUsermove = FALSE;
  cps->sendICS = FALSE;
  cps->sendName = appData.icsActive;
  cps->sdKludge = FALSE;
  cps->stKludge = FALSE;
  if(cps->tidy == NULL) cps->tidy = (char*) malloc(MSG_SIZ);
  TidyProgramName(cps->program, cps->host, cps->tidy);
  cps->matchWins = 0;
  ASSIGN(cps->variants, appData.noChessProgram ? "" : appData.variant);
  cps->analysisSupport = 2; /* detect */
  cps->analyzing = FALSE;
  cps->initDone = FALSE;
  cps->reload = FALSE;
  cps->pseudo = appData.pseudo[n];

  /* New features added by Tord: */
  cps->useFEN960 = FALSE;
  cps->useOOCastle = TRUE;
  /* End of new features added by Tord. */
  cps->fenOverride  = appData.fenOverride[n];

  /* [HGM] time odds: set factor for each machine */
  cps->timeOdds  = appData.timeOdds[n];

  /* [HGM] secondary TC: how to handle sessions that do not fit in 'level'*/
  cps->accumulateTC = appData.accumulateTC[n];
  cps->maxNrOfSessions = 1;

  /* [HGM] debug */
  cps->debug = FALSE;

  cps->drawDepth = appData.drawDepth[n];
  cps->supportsNPS = UNKNOWN;
  cps->memSize = FALSE;
  cps->maxCores = FALSE;
  ASSIGN(cps->egtFormats, "");

  /* [HGM] options */
  cps->optionSettings  = appData.engOptions[n];

  cps->scoreIsAbsolute = appData.scoreIsAbsolute[n]; /* [AS] */
  cps->isUCI = appData.isUCI[n]; /* [AS] */
  cps->hasOwnBookUCI = appData.hasOwnBookUCI[n]; /* [AS] */
  cps->highlight = 0;

  if (appData.protocolVersion[n] > PROTOVER || appData.protocolVersion[n] < 1)
  {
    char buf[MSG_SIZ];
    int len;

    len = snprintf(buf, MSG_SIZ, _("protocol version %d not supported"),
        appData.protocolVersion[n]);
    if( (len >= MSG_SIZ) && appData.debugMode )
      fprintf(debugFP, "InitBackEnd1: buffer truncated.\n");

    DisplayFatalError(buf, 0, 2);
  }
  else
  {
    cps->protocolVersion = appData.protocolVersion[n];
  }

  InitEngineUCI( installDir, cps );  // [HGM] moved here from winboard.c, to make available in xboard
  ParseFeatures(appData.featureDefaults, cps);
}

ChessProgramState *savCps;

GameMode oldMode;

void LoadEngine ()
{
  int i;
  if(WaitForEngine(savCps, LoadEngine)) return;
  CommonEngineInit(); // recalculate time odds
  if(gameInfo.variant != StringToVariant(appData.variant)) {
    // we changed variant when loading the engine; this forces us to reset
    Reset(TRUE, savCps != &first);
    oldMode = BeginningOfGame; // to prevent restoring old mode
  }
  InitChessProgram(savCps, FALSE);
  if(gameMode == EditGame) SendToProgram("force\n", savCps); // in EditGame mode engine must be in force mode
  DisplayMessage("", "");
  if (startedFromSetupPosition) SendBoard(savCps, backwardMostMove);
  for (i = backwardMostMove; i < currentMove; i++) SendMoveToProgram(i, savCps);
  ThawUI();
  SetGNUMode();
  if(oldMode == AnalyzeMode) AnalyzeModeEvent();
}

void ReplaceEngine (ChessProgramState *cps, int n)
{
  oldMode = gameMode; // remember mode, so it can be restored after loading sequence is complete
  keepInfo = 1;
  if(oldMode != BeginningOfGame) EditGameEvent();
  keepInfo = 0;
  UnloadEngine(cps);
  appData.noChessProgram = FALSE;
  appData.clockMode = TRUE;
  InitEngine(cps, n);
  UpdateLogos(TRUE);
  if(n) return; // only startup first engine immediately; second can wait
  savCps = cps; // parameter to LoadEngine passed as globals, to allow scheduled calling :-(
  LoadEngine();
}

extern char *engineName, *engineDir, *engineChoice, *engineLine, *nickName, *params;
extern Boolean isUCI, hasBook, storeVariant, v1, addToList, useNick;

static char resetOptions[] =
"-reuse -firstIsUCI false -firstHasOwnBookUCI true -firstTimeOdds 1 "
"-firstInitString \"" INIT_STRING "\" -firstComputerString \"" COMPUTER_STRING "\" "
"-firstFeatures \"\" -firstLogo \"\" -firstAccumulateTC 1 -fd \".\" "
"-firstOptions \"\" -firstNPS -1 -fn \"\" -firstScoreAbs true";

void FloatToFront(char **list, char *engineLine)
{
  char buf[MSG_SIZ], tidy[MSG_SIZ], *p = buf, *q, *r = buf;
  int i=0;
  if(appData.recentEngines <= 0) return;
  TidyProgramName(engineLine, "localhost", tidy+1);
  tidy[0] = buf[0] = '\n'; strcat(tidy, "\n");
  strncpy(buf+1, *list, MSG_SIZ-50);
  if(p = strstr(buf, tidy)) { // tidy name appears in list
    q = strchr(++p, '\n'); if(q == NULL) return; // malformed, don't touch
    while(*p++ = *++q); // squeeze out
  }
  strcat(tidy, buf+1); // put list behind tidy name
  p = tidy + 1; while(q = strchr(p, '\n')) i++, r = p, p = q + 1; // count entries in new list
  if(i > appData.recentEngines) *r = NULLCHAR; // if maximum rached, strip off last
  ASSIGN(*list, tidy+1);
}

char *insert, *wbOptions; // point in ChessProgramNames were we should insert new engine

void Load (ChessProgramState *cps, int i)
{
  char *p, *q, buf[MSG_SIZ], command[MSG_SIZ], buf2[MSG_SIZ], buf3[MSG_SIZ], jar;
  if(engineLine && engineLine[0]) { // an engine was selected from the combo box
    snprintf(buf, MSG_SIZ, "-fcp %s", engineLine);
    SwapEngines(i); // kludge to parse -f* / -first* like it is -s* / -second*
    ParseArgsFromString(resetOptions); appData.pvSAN[0] = FALSE;
    FREE(appData.fenOverride[0]); appData.fenOverride[0] = NULL;
    appData.firstProtocolVersion = PROTOVER;
    ParseArgsFromString(buf);
    SwapEngines(i);
    ReplaceEngine(cps, i);
    FloatToFront(&appData.recentEngineList, engineLine);
    if(gameMode == BeginningOfGame) Reset(TRUE, TRUE);
    return;
  }
  p = engineName;
  while(q = strchr(p, SLASH)) p = q+1;
  if(*p== NULLCHAR) { DisplayError(_("You did not specify the engine executable"), 0); return; }
  if(engineDir[0] != NULLCHAR) {
    ASSIGN(appData.directory[i], engineDir); p = engineName;
  } else if(p != engineName) { // derive directory from engine path, when not given
    p[-1] = 0;
    ASSIGN(appData.directory[i], engineName);
    p[-1] = SLASH;
    if(SLASH == '/' && p - engineName > 1) *(p -= 2) = '.'; // for XBoard use ./exeName as command after split!
  } else { ASSIGN(appData.directory[i], "."); }
  jar = (strstr(p, ".jar") == p + strlen(p) - 4);
  if(params[0]) {
    if(strchr(p, ' ') && !strchr(p, '"')) snprintf(buf2, MSG_SIZ, "\"%s\"", p), p = buf2; // quote if it contains spaces
    snprintf(command, MSG_SIZ, "%s %s", p, params);
    p = command;
  }
  if(jar) { snprintf(buf3, MSG_SIZ, "java -jar %s", p); p = buf3; }
  ASSIGN(appData.chessProgram[i], p);
  appData.isUCI[i] = isUCI;
  appData.protocolVersion[i] = v1 ? 1 : PROTOVER;
  appData.hasOwnBookUCI[i] = hasBook;
  if(!nickName[0]) useNick = FALSE;
  if(useNick) ASSIGN(appData.pgnName[i], nickName);
  if(addToList) {
    int len;
    char quote;
    q = firstChessProgramNames;
    if(nickName[0]) snprintf(buf, MSG_SIZ, "\"%s\" -fcp ", nickName); else buf[0] = NULLCHAR;
    quote = strchr(p, '"') ? '\'' : '"'; // use single quotes around engine command if it contains double quotes
    snprintf(buf+strlen(buf), MSG_SIZ-strlen(buf), "%c%s%c -fd \"%s\"%s%s%s%s%s%s%s%s\n",
        quote, p, quote, appData.directory[i],
        useNick ? " -fn \"" : "",
        useNick ? nickName : "",
        useNick ? "\"" : "",
        v1 ? " -firstProtocolVersion 1" : "",
        hasBook ? "" : " -fNoOwnBookUCI",
        isUCI ? (isUCI == TRUE ? " -fUCI" : gameInfo.variant == VariantShogi ? " -fUSI" : " -fUCCI") : "",
        storeVariant ? " -variant " : "",
        storeVariant ? VariantName(gameInfo.variant) : "");
    if(wbOptions && wbOptions[0]) snprintf(buf+strlen(buf)-1, MSG_SIZ-strlen(buf), " %s\n", wbOptions);
    firstChessProgramNames = malloc(len = strlen(q) + strlen(buf) + 1);
    if(insert != q) insert[-1] = NULLCHAR;
    snprintf(firstChessProgramNames, len, "%s\n%s%s", q, buf, insert);
    if(q) 	free(q);
    FloatToFront(&appData.recentEngineList, buf);
  }
  ReplaceEngine(cps, i);
}

void InitTimeControls ()
{
  int matched, min, sec;
  /*
   * Parse timeControl resource
   */
  if (!ParseTimeControl(appData.timeControl, appData.timeIncrement,
        appData.movesPerSession)) {
    char buf[MSG_SIZ];
    snprintf(buf, sizeof(buf), _("bad timeControl option %s"), appData.timeControl);
    DisplayFatalError(buf, 0, 2);
  }

  /*
   * Parse searchTime resource
   */
  if (*appData.searchTime != NULLCHAR) {
    matched = sscanf(appData.searchTime, "%d:%d", &min, &sec);
    if (matched == 1) {
      searchTime = min * 60;
    } else if (matched == 2) {
      searchTime = min * 60 + sec;
    } else {
      char buf[MSG_SIZ];
      snprintf(buf, sizeof(buf), _("bad searchTime option %s"), appData.searchTime);
      DisplayFatalError(buf, 0, 2);
    }
  }
}

void InitBackEnd1 ()
{

  ShowThinkingEvent(); // [HGM] thinking: make sure post/nopost state is set according to options
  startVariant = StringToVariant(appData.variant); // [HGM] nicks: remember original variant

  GetTimeMark(&programStartTime);
  srandom((programStartTime.ms + 1000*programStartTime.sec)*0x1001001); // [HGM] book: makes sure random is unpredictabe to msec level
  appData.seedBase = random() + (random()<<15);
  pauseStart = programStartTime; pauseStart.sec -= 100; // [HGM] matchpause: fake a pause that has long since ended

  ClearProgramStats();
  programStats.ok_to_send = 1;
  programStats.seen_stat = 0;

  /*
   * Initialize game list
   */
  ListNew(&gameList);


  /*
   * Internet chess server status
   */
  if (appData.icsActive) {
    appData.matchMode = FALSE;
    appData.matchGames = 0;
#if ZIPPY
    appData.noChessProgram = !appData.zippyPlay;
#else
    appData.zippyPlay = FALSE;
    appData.zippyTalk = FALSE;
    appData.noChessProgram = TRUE;
#endif
    if (*appData.icsHelper != NULLCHAR) {
      appData.useTelnet = TRUE;
      appData.telnetProgram = appData.icsHelper;
    }
  } else {
    appData.zippyTalk = appData.zippyPlay = FALSE;
  }

  /* [AS] Initialize pv info list [HGM] and game state */
  {
    int i, j;

    for( i=0; i<=framePtr; i++ ) {
      pvInfoList[i].depth = -1;
      boards[i][EP_STATUS] = EP_NONE;
      for( j=0; j<BOARD_FILES-2; j++ ) boards[i][CASTLING][j] = NoRights;
    }
  }

  InitTimeControls();

  /* [AS] Adjudication threshold */
  adjudicateLossThreshold = appData.adjudicateLossThreshold;

  InitEngine(&first, 0);
  InitEngine(&second, 1);
  CommonEngineInit();

  pairing.which = "pairing"; // pairing engine
  pairing.pr = NoProc;
  pairing.isr = NULL;
  pairing.program = appData.pairingEngine;
  pairing.host = "localhost";
  pairing.dir = ".";

  if (appData.icsActive) {
    appData.clockMode = TRUE;  /* changes dynamically in ICS mode */
  } else if (appData.noChessProgram) { // [HGM] st: searchTime mode now also is clockMode
    appData.clockMode = FALSE;
    first.sendTime = second.sendTime = 0;
  }

#if ZIPPY
  /* Override some settings from environment variables, for backward
     compatibility.  Unfortunately it's not feasible to have the env
     vars just set defaults, at least in xboard.  Ugh.
     */
  if (appData.icsActive && (appData.zippyPlay || appData.zippyTalk)) {
    ZippyInit();
  }
#endif

  if (!appData.icsActive) {
    char buf[MSG_SIZ];
    int len;

    /* Check for variants that are supported only in ICS mode,
       or not at all.  Some that are accepted here nevertheless
       have bugs; see comments below.
       */
    VariantClass variant = StringToVariant(appData.variant);
    switch (variant) {
      case VariantBughouse:     /* need four players and two boards */
      case VariantKriegspiel:   /* need to hide pieces and move details */
        /* case VariantFischeRandom: (Fabien: moved below) */
        len = snprintf(buf,MSG_SIZ, _("Variant %s supported only in ICS mode"), appData.variant);
        if( (len >= MSG_SIZ) && appData.debugMode )
          fprintf(debugFP, "InitBackEnd1: buffer truncated.\n");

        DisplayFatalError(buf, 0, 2);
        return;

      case VariantUnknown:
      case VariantLoadable:
      case Variant29:
      case Variant30:
      case Variant31:
      case Variant32:
      case Variant33:
      case Variant34:
      case Variant35:
      case Variant36:
      default:
        len = snprintf(buf, MSG_SIZ, _("Unknown variant name %s"), appData.variant);
        if( (len >= MSG_SIZ) && appData.debugMode )
          fprintf(debugFP, "InitBackEnd1: buffer truncated.\n");

        DisplayFatalError(buf, 0, 2);
        return;

      case VariantNormal:     /* definitely works! */
        if(strcmp(appData.variant, "normal") && !appData.noChessProgram) { // [HGM] hope this is an engine-defined variant
          safeStrCpy(engineVariant, appData.variant, MSG_SIZ);
          return;
        }
      case VariantXiangqi:    /* [HGM] repetition rules not implemented */
      case VariantFairy:      /* [HGM] TestLegality definitely off! */
      case VariantGothic:     /* [HGM] should work */
      case VariantCapablanca: /* [HGM] should work */
      case VariantCourier:    /* [HGM] initial forced moves not implemented */
      case VariantShogi:      /* [HGM] could still mate with pawn drop */
      case VariantChu:        /* [HGM] experimental */
      case VariantKnightmate: /* [HGM] should work */
      case VariantCylinder:   /* [HGM] untested */
      case VariantFalcon:     /* [HGM] untested */
      case VariantCrazyhouse: /* holdings not shown, ([HGM] fixed that!)
                                 offboard interposition not understood */
      case VariantWildCastle: /* pieces not automatically shuffled */
      case VariantNoCastle:   /* pieces not automatically shuffled */
      case VariantFischeRandom: /* [HGM] works and shuffles pieces */
      case VariantLosers:     /* should work except for win condition,
                                 and doesn't know captures are mandatory */
      case VariantSuicide:    /* should work except for win condition,
                                 and doesn't know captures are mandatory */
      case VariantGiveaway:   /* should work except for win condition,
                                 and doesn't know captures are mandatory */
      case VariantTwoKings:   /* should work */
      case VariantAtomic:     /* should work except for win condition */
      case Variant3Check:     /* should work except for win condition */
      case VariantShatranj:   /* should work except for all win conditions */
      case VariantMakruk:     /* should work except for draw countdown */
      case VariantASEAN :     /* should work except for draw countdown */
      case VariantBerolina:   /* might work if TestLegality is off */
      case VariantCapaRandom: /* should work */
      case VariantJanus:      /* should work */
      case VariantSuper:      /* experimental */
      case VariantGreat:      /* experimental, requires legality testing to be off */
      case VariantSChess:     /* S-Chess, should work */
      case VariantGrand:      /* should work */
      case VariantSpartan:    /* should work */
      case VariantLion:       /* should work */
      case VariantChuChess:   /* should work */
        break;
    }
  }

}

int NextIntegerFromString (char ** str, long * value)
{
  int result = -1;
  char * s = *str;

  while( *s == ' ' || *s == '\t' ) {
    s++;
  }

  *value = 0;

  if( *s >= '0' && *s <= '9' ) {
    while( *s >= '0' && *s <= '9' ) {
      *value = *value * 10 + (*s - '0');
      s++;
    }

    result = 0;
  }

  *str = s;

  return result;
}

int NextTimeControlFromString (char ** str, long * value)
{
  long temp;
  int result = NextIntegerFromString( str, &temp );

  if( result == 0 ) {
    *value = temp * 60; /* Minutes */
    if( **str == ':' ) {
      (*str)++;
      result = NextIntegerFromString( str, &temp );
      *value += temp; /* Seconds */
    }
  }

  return result;
}

int NextSessionFromString (char ** str, int *moves, long * tc, long *inc, int *incType)
{   /* [HGM] routine added to read '+moves/time' for secondary time control. */
  int result = -1, type = 0; long temp, temp2;

  if(**str != ':') return -1; // old params remain in force!
  (*str)++;
  if(**str == '*') type = *(*str)++, temp = 0; // sandclock TC
  if( NextIntegerFromString( str, &temp ) ) return -1;
  if(type) { *moves = 0; *tc = temp * 500; *inc = temp * 1000; *incType = '*'; return 0; }

  if(**str != '/') {
    /* time only: incremental or sudden-death time control */
    if(**str == '+') { /* increment follows; read it */
      (*str)++;
      if(**str == '!') type = *(*str)++; // Bronstein TC
      if(result = NextIntegerFromString( str, &temp2)) return -1;
      *inc = temp2 * 1000;
      if(**str == '.') { // read fraction of increment
        char *start = ++(*str);
        if(result = NextIntegerFromString( str, &temp2)) return -1;
        temp2 *= 1000;
        while(start++ < *str) temp2 /= 10;
        *inc += temp2;
      }
    } else *inc = 0;
    *moves = 0; *tc = temp * 1000; *incType = type;
    return 0;
  }

  (*str)++; /* classical time control */
  result = NextIntegerFromString( str, &temp2); // NOTE: already converted to seconds by ParseTimeControl()

  if(result == 0) {
    *moves = temp;
    *tc    = temp2 * 1000;
    *inc   = 0;
    *incType = type;
  }
  return result;
}

int GetTimeQuota (int movenr, int lastUsed, char *tcString)
{   /* [HGM] get time to add from the multi-session time-control string */
  int incType, moves=1; /* kludge to force reading of first session */
  long time, increment;
  char *s = tcString;

  if(!s || !*s) return 0; // empty TC string means we ran out of the last sudden-death version
  do {
    if(moves) NextSessionFromString(&s, &moves, &time, &increment, &incType);
    nextSession = s; suddenDeath = moves == 0 && increment == 0;
    if(movenr == -1) return time;    /* last move before new session     */
    if(incType == '*') increment = 0; else // for sandclock, time is added while not thinking
      if(incType == '!' && lastUsed < increment) increment = lastUsed;
    if(!moves) return increment;     /* current session is incremental   */
    if(movenr >= 0) movenr -= moves; /* we already finished this session */
  } while(movenr >= -1);               /* try again for next session       */

  return 0; // no new time quota on this move
}

int ParseTimeControl (char *tc, float ti, int mps)
{
  long tc1;
  long tc2;
  char buf[MSG_SIZ], buf2[MSG_SIZ], *mytc = tc;
  int min, sec=0;

  if(ti >= 0 && !strchr(tc, '+') && !strchr(tc, '/') ) mps = 0;
  if(!strchr(tc, '+') && !strchr(tc, '/') && sscanf(tc, "%d:%d", &min, &sec) >= 1)
    sprintf(mytc=buf2, "%d", 60*min+sec); // convert 'classical' min:sec tc string to seconds
  if(ti > 0) {

    if(mps)
      snprintf(buf, MSG_SIZ, ":%d/%s+%g", mps, mytc, ti);
    else
      snprintf(buf, MSG_SIZ, ":%s+%g", mytc, ti);
  } else {
    if(mps)
      snprintf(buf, MSG_SIZ, ":%d/%s", mps, mytc);
    else
      snprintf(buf, MSG_SIZ, ":%s", mytc);
  }
  fullTimeControlString = StrSave(buf); // this should now be in PGN format

  if( NextTimeControlFromString( &tc, &tc1 ) != 0 ) {
    return FALSE;
  }

  if( *tc == '/' ) {
    /* Parse second time control */
    tc++;

    if( NextTimeControlFromString( &tc, &tc2 ) != 0 ) {
      return FALSE;
    }

    if( tc2 == 0 ) {
      return FALSE;
    }

    timeControl_2 = tc2 * 1000;
  }
  else {
    timeControl_2 = 0;
  }

  if( tc1 == 0 ) {
    return FALSE;
  }

  timeControl = tc1 * 1000;

  if (ti >= 0) {
    timeIncrement = ti * 1000;  /* convert to ms */
    movesPerSession = 0;
  } else {
    timeIncrement = 0;
    movesPerSession = mps;
  }
  return TRUE;
}

void InitBackEnd2 ()
{
  if (appData.debugMode) {
#    ifdef __GIT_VERSION
    fprintf(debugFP, "Version: %s (%s)\n", programVersion, __GIT_VERSION);
#    else
    fprintf(debugFP, "Version: %s\n", programVersion);
#    endif
  }
  ASSIGN(currentDebugFile, appData.nameOfDebugFile); // [HGM] debug split: remember initial name in use

  set_cont_sequence(appData.wrapContSeq);
  if (appData.matchGames > 0) {
    appData.matchMode = TRUE;
  } else if (appData.matchMode) {
    appData.matchGames = 1;
  }
  if(appData.matchMode && appData.sameColorGames > 0) /* [HGM] alternate: overrule matchGames */
    appData.matchGames = appData.sameColorGames;
  if(appData.rewindIndex > 1) { /* [HGM] autoinc: rewind implies auto-increment and overrules given index */
    if(appData.loadPositionIndex >= 0) appData.loadPositionIndex = -1;
    if(appData.loadGameIndex >= 0) appData.loadGameIndex = -1;
  }
  Reset(TRUE, FALSE);
  if (appData.noChessProgram || first.protocolVersion == 1) {
    InitBackEnd3();
  } else {
    /* kludge: allow timeout for initial "feature" commands */
    FreezeUI();
    DisplayMessage("", _("Starting chess program"));
    ScheduleDelayedEvent(InitBackEnd3, FEATURE_TIMEOUT);
  }
}

int CalculateIndex (int index, int gameNr)
{   // [HGM] autoinc: absolute way to determine load index from game number (taking auto-inc and rewind into account)
  int res;
  if(index > 0) return index; // fixed nmber
  if(index == 0) return 1;
  res = (index == -1 ? gameNr : (gameNr-1)/2 + 1); // autoinc
  if(appData.rewindIndex > 0) res = (res-1) % appData.rewindIndex + 1; // rewind
  return res;
}

int LoadGameOrPosition (int gameNr)
{   // [HGM] taken out of MatchEvent and NextMatchGame (to combine it)
  if (*appData.loadGameFile != NULLCHAR) {
    if (!LoadGameFromFile(appData.loadGameFile,
          CalculateIndex(appData.loadGameIndex, gameNr),
          appData.loadGameFile, FALSE)) {
      DisplayFatalError(_("Bad game file"), 0, 1);
      return 0;
    }
  } else if (*appData.loadPositionFile != NULLCHAR) {
    if (!LoadPositionFromFile(appData.loadPositionFile,
          CalculateIndex(appData.loadPositionIndex, gameNr),
          appData.loadPositionFile)) {
      DisplayFatalError(_("Bad position file"), 0, 1);
      return 0;
    }
  }
  return 1;
}

void ReserveGame (int gameNr, char resChar)
{
  FILE *tf = fopen(appData.tourneyFile, "r+");
  char *p, *q, c, buf[MSG_SIZ];
  if(tf == NULL) { nextGame = appData.matchGames + 1; return; } // kludge to terminate match
  safeStrCpy(buf, lastMsg, MSG_SIZ);
  DisplayMessage(_("Pick new game"), "");
  flock(fileno(tf), LOCK_EX); // lock the tourney file while we are messing with it
  ParseArgsFromFile(tf);
  p = q = appData.results;
  if(appData.debugMode) {
    char *r = appData.participants;
    fprintf(debugFP, "results = '%s'\n", p);
    while(*r) fprintf(debugFP, *r >= ' ' ? "%c" : "\\%03o", *r), r++;
    fprintf(debugFP, "\n");
  }
  while(*q && *q != ' ') q++; // get first un-played game (could be beyond end!)
  nextGame = q - p;
  q = malloc(strlen(p) + 2); // could be arbitrary long, but allow to extend by one!
  safeStrCpy(q, p, strlen(p) + 2);
  if(gameNr >= 0) q[gameNr] = resChar; // replace '*' with result
  if(appData.debugMode) fprintf(debugFP, "pick next game from '%s': %d\n", q, nextGame);
  if(nextGame <= appData.matchGames && resChar != ' ' && !abortMatch) { // reserve next game if tourney not yet done
    if(q[nextGame] == NULLCHAR) q[nextGame+1] = NULLCHAR; // append one char
    q[nextGame] = '*';
  }
  fseek(tf, -(strlen(p)+4), SEEK_END);
  c = fgetc(tf);
  if(c != '"') // depending on DOS or Unix line endings we can be one off
    fseek(tf, -(strlen(p)+2), SEEK_END);
  else fseek(tf, -(strlen(p)+3), SEEK_END);
  fprintf(tf, "%s\"\n", q); fclose(tf); // update, and flush by closing
  DisplayMessage(buf, "");
  free(p); appData.results = q;
  if(nextGame <= appData.matchGames && resChar != ' ' && !abortMatch &&
      (gameNr < 0 || nextGame / appData.defaultMatchGames != gameNr / appData.defaultMatchGames)) {
    int round = appData.defaultMatchGames * appData.tourneyType;
    if(gameNr < 0 || appData.tourneyType < 1 ||  // gauntlet engine can always stay loaded as first engine
        appData.tourneyType > 1 && nextGame/round != gameNr/round) // in multi-gauntlet change only after round
      UnloadEngine(&first);  // next game belongs to other pairing;
    UnloadEngine(&second); // already unload the engines, so TwoMachinesEvent will load new ones.
  }
  if(appData.debugMode) fprintf(debugFP, "Reserved, next=%d, nr=%d\n", nextGame, gameNr);
}

void MatchEvent (int mode)
{	// [HGM] moved out of InitBackend3, to make it callable when match starts through menu
  int dummy;
  if(matchMode) { // already in match mode: switch it off
    abortMatch = TRUE;
    if(!appData.tourneyFile[0]) appData.matchGames = matchGame; // kludge to let match terminate after next game.
    return;
  }
  //	if(gameMode != BeginningOfGame) {
  //	    DisplayError(_("You can only start a match from the initial position."), 0);
  //	    return;
  //	}
  abortMatch = FALSE;
  if(mode == 2) appData.matchGames = appData.defaultMatchGames;
  /* Set up machine vs. machine match */
  nextGame = 0;
  NextTourneyGame(-1, &dummy); // sets appData.matchGames if this is tourney, to make sure ReserveGame knows it
  if(appData.tourneyFile[0]) {
    ReserveGame(-1, 0);
    if(nextGame > appData.matchGames) {
      char buf[MSG_SIZ];
      if(strchr(appData.results, '*') == NULL) {
        FILE *f;
        appData.tourneyCycles++;
        if(f = WriteTourneyFile(appData.results, NULL)) { // make a tourney file with increased number of cycles
          fclose(f);
          NextTourneyGame(-1, &dummy);
          ReserveGame(-1, 0);
          if(nextGame <= appData.matchGames) {
            DisplayNote(_("You restarted an already completed tourney.\nOne more cycle will now be added to it.\nGames commence in 10 sec."));
            matchMode = mode;
            ScheduleDelayedEvent(NextMatchGame, 10000);
            return;
          }
        }
      }
      snprintf(buf, MSG_SIZ, _("All games in tourney '%s' are already played or playing"), appData.tourneyFile);
      DisplayError(buf, 0);
      appData.tourneyFile[0] = 0;
      return;
    }
  } else
    if (appData.noChessProgram) {  // [HGM] in tourney engines are loaded automatically
      DisplayFatalError(_("Can't have a match with no chess programs"),
          0, 2);
      return;
    }
  matchMode = mode;
  matchGame = roundNr = 1;
  first.matchWins = second.matchWins = totalTime = 0; // [HGM] match: needed in later matches
  NextMatchGame();
}

char *comboLine = NULL; // [HGM] recent: WinBoard's first-engine combobox line

void InitBackEnd3 P((void))
{
  GameMode initialMode;
  char buf[MSG_SIZ];
  int err, len;

  ParseFeatures(appData.features[0], &first);
  if(!appData.icsActive && !appData.noChessProgram && !appData.matchMode &&                         // mode involves only first engine
      !strcmp(appData.variant, "normal") &&                                                          // no explicit variant request
      appData.NrRanks == -1 && appData.NrFiles == -1 && appData.holdingsSize == -1 &&               // no size overrides requested
      !SupportedVariant(first.variants, VariantNormal, 8, 8, 0, first.protocolVersion, "") &&        // but 'normal' won't work with engine
      !SupportedVariant(first.variants, VariantFischeRandom, 8, 8, 0, first.protocolVersion, "") ) { // nor will Chess960
    char c, *q = first.variants, *p = strchr(q, ',');
    if(p) *p = NULLCHAR;
    if(StringToVariant(q) != VariantUnknown) { // the engine can play a recognized variant, however
      int w, h, s;
      if(sscanf(q, "%dx%d+%d_%c", &w, &h, &s, &c) == 4) // get size overrides the engine needs with it (if any)
        appData.NrFiles = w, appData.NrRanks = h, appData.holdingsSize = s, q = strchr(q, '_') + 1;
      ASSIGN(appData.variant, q); // fake user requested the first variant played by the engine
      Reset(TRUE, FALSE);         // and re-initialize
    }
    if(p) *p = ',';
  }

  InitChessProgram(&first, startedFromSetupPosition);

  if(!appData.noChessProgram) {  /* [HGM] tidy: redo program version to use name from myname feature */
    free(programVersion);
    programVersion = (char*) malloc(8 + strlen(PACKAGE_STRING) + strlen(first.tidy));
    sprintf(programVersion, "%s + %s", PACKAGE_STRING, first.tidy);
    FloatToFront(&appData.recentEngineList, comboLine ? comboLine : appData.firstChessProgram);
  }

  if (appData.icsActive) {
#ifdef WIN32
    /* [DM] Make a console window if needed [HGM] merged ifs */
    ConsoleCreate();
#endif
    err = establish();
    if (err != 0)
    {
      if (*appData.icsCommPort != NULLCHAR)
        len = snprintf(buf, MSG_SIZ, _("Could not open comm port %s"),
            appData.icsCommPort);
      else
        len = snprintf(buf, MSG_SIZ, _("Could not connect to host %s, port %s"),
            appData.icsHost, appData.icsPort);

      if( (len >= MSG_SIZ) && appData.debugMode )
        fprintf(debugFP, "InitBackEnd3: buffer truncated.\n");

      DisplayFatalError(buf, err, 1);
      return;
    }
    SetICSMode();
    telnetISR =
      AddInputSource(icsPR, FALSE, read_from_ics, &telnetISR);
    fromUserISR =
      AddInputSource(NoProc, FALSE, read_from_player, &fromUserISR);
    if(appData.keepAlive) // [HGM] alive: schedule sending of dummy 'date' command
      ScheduleDelayedEvent(KeepAlive, appData.keepAlive*60*1000);
  } else if (appData.noChessProgram) {
    SetNCPMode();
  } else {
    SetGNUMode();
  }

  if (*appData.cmailGameName != NULLCHAR) {
    SetCmailMode();
    OpenLoopback(&cmailPR);
    cmailISR =
      AddInputSource(cmailPR, FALSE, CmailSigHandlerCallBack, &cmailISR);
  }

  ThawUI();
  DisplayMessage("", "");
  if (StrCaseCmp(appData.initialMode, "") == 0) {
    initialMode = BeginningOfGame;
    if(!appData.icsActive && appData.noChessProgram) { // [HGM] could be fall-back
      gameMode = MachinePlaysBlack; // "Machine Black" might have been implicitly highlighted
      ModeHighlight(); // make sure XBoard knows it is highlighted, so it will un-highlight it
      gameMode = BeginningOfGame; // in case BeginningOfGame now means "Edit Position"
      ModeHighlight();
    }
  } else if (StrCaseCmp(appData.initialMode, "TwoMachines") == 0) {
    initialMode = TwoMachinesPlay;
  } else if (StrCaseCmp(appData.initialMode, "AnalyzeFile") == 0) {
    initialMode = AnalyzeFile;
  } else if (StrCaseCmp(appData.initialMode, "Analysis") == 0) {
    initialMode = AnalyzeMode;
  } else if (StrCaseCmp(appData.initialMode, "MachineWhite") == 0) {
    initialMode = MachinePlaysWhite;
  } else if (StrCaseCmp(appData.initialMode, "MachineBlack") == 0) {
    initialMode = MachinePlaysBlack;
  } else if (StrCaseCmp(appData.initialMode, "EditGame") == 0) {
    initialMode = EditGame;
  } else if (StrCaseCmp(appData.initialMode, "EditPosition") == 0) {
    initialMode = EditPosition;
  } else if (StrCaseCmp(appData.initialMode, "Training") == 0) {
    initialMode = Training;
  } else {
    len = snprintf(buf, MSG_SIZ, _("Unknown initialMode %s"), appData.initialMode);
    if( (len >= MSG_SIZ) && appData.debugMode )
      fprintf(debugFP, "InitBackEnd3: buffer truncated.\n");

    DisplayFatalError(buf, 0, 2);
    return;
  }

  if (appData.matchMode) {
    if(appData.tourneyFile[0]) { // start tourney from command line
      FILE *f;
      if(f = fopen(appData.tourneyFile, "r")) {
        ParseArgsFromFile(f); // make sure tourney parmeters re known
        fclose(f);
        appData.clockMode = TRUE;
        SetGNUMode();
      } else appData.tourneyFile[0] = NULLCHAR; // for now ignore bad tourney file
    }
    MatchEvent(TRUE);
  } else if (*appData.cmailGameName != NULLCHAR) {
    /* Set up cmail mode */
    ReloadCmailMsgEvent(TRUE);
  } else {
    /* Set up other modes */
    if (initialMode == AnalyzeFile) {
      if (*appData.loadGameFile == NULLCHAR) {
        DisplayFatalError(_("AnalyzeFile mode requires a game file"), 0, 1);
        return;
      }
    }
    if (*appData.loadGameFile != NULLCHAR) {
      (void) LoadGameFromFile(appData.loadGameFile,
          appData.loadGameIndex,
          appData.loadGameFile, TRUE);
    } else if (*appData.loadPositionFile != NULLCHAR) {
      (void) LoadPositionFromFile(appData.loadPositionFile,
          appData.loadPositionIndex,
          appData.loadPositionFile);
      /* [HGM] try to make self-starting even after FEN load */
      /* to allow automatic setup of fairy variants with wtm */
      if(initialMode == BeginningOfGame && !blackPlaysFirst) {
        gameMode = BeginningOfGame;
        setboardSpoiledMachineBlack = 1;
      }
      /* [HGM] loadPos: make that every new game uses the setup */
      /* from file as long as we do not switch variant          */
      if(!blackPlaysFirst) {
        startedFromPositionFile = TRUE;
        CopyBoard(filePosition, boards[0]);
        CopyBoard(initialPosition, boards[0]);
      }
    } else if(*appData.fen != NULLCHAR) {
      if(ParseFEN(filePosition, &blackPlaysFirst, appData.fen, TRUE) && !blackPlaysFirst) {
        startedFromPositionFile = TRUE;
        Reset(TRUE, TRUE);
      }
    }
    if (initialMode == AnalyzeMode) {
      if (appData.noChessProgram) {
        DisplayFatalError(_("Analysis mode requires a chess engine"), 0, 2);
        return;
      }
      if (appData.icsActive) {
        DisplayFatalError(_("Analysis mode does not work with ICS mode"),0,2);
        return;
      }
      AnalyzeModeEvent();
    } else if (initialMode == AnalyzeFile) {
      appData.showThinking = TRUE; // [HGM] thinking: moved out of ShowThinkingEvent
      ShowThinkingEvent();
      AnalyzeFileEvent();
      AnalysisPeriodicEvent(1);
    } else if (initialMode == MachinePlaysWhite) {
      if (appData.noChessProgram) {
        DisplayFatalError(_("MachineWhite mode requires a chess engine"),
            0, 2);
        return;
      }
      if (appData.icsActive) {
        DisplayFatalError(_("MachineWhite mode does not work with ICS mode"),
            0, 2);
        return;
      }
      MachineWhiteEvent();
    } else if (initialMode == MachinePlaysBlack) {
      if (appData.noChessProgram) {
        DisplayFatalError(_("MachineBlack mode requires a chess engine"),
            0, 2);
        return;
      }
      if (appData.icsActive) {
        DisplayFatalError(_("MachineBlack mode does not work with ICS mode"),
            0, 2);
        return;
      }
      MachineBlackEvent();
    } else if (initialMode == TwoMachinesPlay) {
      if (appData.noChessProgram) {
        DisplayFatalError(_("TwoMachines mode requires a chess engine"),
            0, 2);
        return;
      }
      if (appData.icsActive) {
        DisplayFatalError(_("TwoMachines mode does not work with ICS mode"),
            0, 2);
        return;
      }
      TwoMachinesEvent();
    } else if (initialMode == EditGame) {
      EditGameEvent();
    } else if (initialMode == EditPosition) {
      EditPositionEvent();
    } else if (initialMode == Training) {
      if (*appData.loadGameFile == NULLCHAR) {
        DisplayFatalError(_("Training mode requires a game file"), 0, 2);
        return;
      }
      TrainingEvent();
    }
  }
}

void HistorySet (char movelist[][2*MOVE_LEN], int first, int last, int current)
{
  DisplayBook(current+1);

  MoveHistorySet( movelist, first, last, current, pvInfoList );

  EvalGraphSet( first, last, current, pvInfoList );

  MakeEngineOutputTitle();
}

/*
 * Establish will establish a contact to a remote host.port.
 * Sets icsPR to a ProcRef for a process (or pseudo-process)
 *  used to talk to the host.
 * Returns 0 if okay, error code if not.
 */
  int
establish ()
{
  char buf[MSG_SIZ];

  if (*appData.icsCommPort != NULLCHAR) {
    /* Talk to the host through a serial comm port */
    return OpenCommPort(appData.icsCommPort, &icsPR);

  } else if (*appData.gateway != NULLCHAR) {
    if (*appData.remoteShell == NULLCHAR) {
      /* Use the rcmd protocol to run telnet program on a gateway host */
      snprintf(buf, sizeof(buf), "%s %s %s",
          appData.telnetProgram, appData.icsHost, appData.icsPort);
      return OpenRcmd(appData.gateway, appData.remoteUser, buf, &icsPR);

    } else {
      /* Use the rsh program to run telnet program on a gateway host */
      if (*appData.remoteUser == NULLCHAR) {
        snprintf(buf, sizeof(buf), "%s %s %s %s %s", appData.remoteShell,
            appData.gateway, appData.telnetProgram,
            appData.icsHost, appData.icsPort);
      } else {
        snprintf(buf, sizeof(buf), "%s %s -l %s %s %s %s",
            appData.remoteShell, appData.gateway,
            appData.remoteUser, appData.telnetProgram,
            appData.icsHost, appData.icsPort);
      }
      return StartChildProcess(buf, "", &icsPR);

    }
  } else if (appData.useTelnet) {
    return OpenTelnet(appData.icsHost, appData.icsPort, &icsPR);

  } else {
    /* TCP socket interface differs somewhat between
       Unix and NT; handle details in the front end.
       */
    return OpenTCP(appData.icsHost, appData.icsPort, &icsPR);
  }
}

void EscapeExpand (char *p, char *q)
{	// [HGM] initstring: routine to shape up string arguments
  while(*p++ = *q++) if(p[-1] == '\\')
    switch(*q++) {
      case 'n': p[-1] = '\n'; break;
      case 'r': p[-1] = '\r'; break;
      case 't': p[-1] = '\t'; break;
      case '\\': p[-1] = '\\'; break;
      case 0: *p = 0; return;
      default: p[-1] = q[-1]; break;
    }
}

void show_bytes (FILE *fp, char *buf, int count)
{
  while (count--) {
    if (*buf < 040 || *(unsigned char *) buf > 0177) {
      fprintf(fp, "\\%03o", *buf & 0xff);
    } else {
      putc(*buf, fp);
    }
    buf++;
  }
  fflush(fp);
}

/* Returns an errno value */
int OutputMaybeTelnet (ProcRef pr, char *message, int count, int *outError)
{
  char buf[8192], *p, *q, *buflim;
  int left, newcount, outcount;

  if (*appData.icsCommPort != NULLCHAR || appData.useTelnet ||
      *appData.gateway != NULLCHAR) {
    if (appData.debugMode) {
      fprintf(debugFP, ">ICS: ");
      show_bytes(debugFP, message, count);
      fprintf(debugFP, "\n");
    }
    return OutputToProcess(pr, message, count, outError);
  }

  buflim = &buf[sizeof(buf)-1]; /* allow 1 byte for expanding last char */
  p = message;
  q = buf;
  left = count;
  newcount = 0;
  while (left) {
    if (q >= buflim) {
      if (appData.debugMode) {
        fprintf(debugFP, ">ICS: ");
        show_bytes(debugFP, buf, newcount);
        fprintf(debugFP, "\n");
      }
      outcount = OutputToProcess(pr, buf, newcount, outError);
      if (outcount < newcount) return -1; /* to be sure */
      q = buf;
      newcount = 0;
    }
    if (*p == '\n') {
      *q++ = '\r';
      newcount++;
    } else if (((unsigned char) *p) == TN_IAC) {
      *q++ = (char) TN_IAC;
      newcount ++;
    }
    *q++ = *p++;
    newcount++;
    left--;
  }
  if (appData.debugMode) {
    fprintf(debugFP, ">ICS: ");
    show_bytes(debugFP, buf, newcount);
    fprintf(debugFP, "\n");
  }
  outcount = OutputToProcess(pr, buf, newcount, outError);
  if (outcount < newcount) return -1; /* to be sure */
  return count;
}

void read_from_player (InputSourceRef isr, VOIDSTAR closure, char *message, int count, int error)
{
  int outError, outCount;
  static int gotEof = 0;
  static FILE *ini;

  /* Pass data read from player on to ICS */
  if (count > 0) {
    gotEof = 0;
    outCount = OutputMaybeTelnet(icsPR, message, count, &outError);
    if (outCount < count) {
      DisplayFatalError(_("Error writing to ICS"), outError, 1);
    }
    if(have_sent_ICS_logon == 2) {
      if(ini = fopen(appData.icsLogon, "w")) { // save first two lines (presumably username & password) on init script file
        fprintf(ini, "%s", message);
        have_sent_ICS_logon = 3;
      } else
        have_sent_ICS_logon = 1;
    } else if(have_sent_ICS_logon == 3) {
      fprintf(ini, "%s", message);
      fclose(ini);
      have_sent_ICS_logon = 1;
    }
  } else if (count < 0) {
    RemoveInputSource(isr);
    DisplayFatalError(_("Error reading from keyboard"), error, 1);
  } else if (gotEof++ > 0) {
    RemoveInputSource(isr);
    DisplayFatalError(_("Got end of file from keyboard"), 0, 666); // [HGM] 666 is kludge to alert front end
  }
}

void KeepAlive ()
{   // [HGM] alive: periodically send dummy (date) command to ICS to prevent time-out
  if(!connectionAlive) DisplayFatalError("No response from ICS", 0, 1);
  connectionAlive = FALSE; // only sticks if no response to 'date' command.
  SendToICS("date\n");
  if(appData.keepAlive) ScheduleDelayedEvent(KeepAlive, appData.keepAlive*60*1000);
}

/* added routine for printf style output to ics */
  void
ics_printf (char *format, ...)
{
  char buffer[MSG_SIZ];
  va_list args;

  va_start(args, format);
  vsnprintf(buffer, sizeof(buffer), format, args);
  buffer[sizeof(buffer)-1] = '\0';
  SendToICS(buffer);
  va_end(args);
}

void SendToICS (char *s)
{
  int count, outCount, outError;

  if (icsPR == NoProc) return;

  count = strlen(s);
  outCount = OutputMaybeTelnet(icsPR, s, count, &outError);
  if (outCount < count) {
    DisplayFatalError(_("Error writing to ICS"), outError, 1);
  }
}

/* This is used for sending logon scripts to the ICS. Sending
   without a delay causes problems when using timestamp on ICC
   (at least on my machine). */
  void
SendToICSDelayed (char *s, long msdelay)
{
  int count, outCount, outError;

  if (icsPR == NoProc) return;

  count = strlen(s);
  if (appData.debugMode) {
    fprintf(debugFP, ">ICS: ");
    show_bytes(debugFP, s, count);
    fprintf(debugFP, "\n");
  }
  outCount = OutputToProcessDelayed(icsPR, s, count, &outError,
      msdelay);
  if (outCount < count) {
    DisplayFatalError(_("Error writing to ICS"), outError, 1);
  }
}


/* Remove all highlighting escape sequences in s
   Also deletes any suffix starting with '('
   */
char *StripHighlightAndTitle (char *s)
{
  static char retbuf[MSG_SIZ];
  char *p = retbuf;

  while (*s != NULLCHAR) {
    while (*s == '\033') {
      while (*s != NULLCHAR && !isalpha(*s)) s++;
      if (*s != NULLCHAR) s++;
    }
    while (*s != NULLCHAR && *s != '\033') {
      if (*s == '(' || *s == '[') {
        *p = NULLCHAR;
        return retbuf;
      }
      *p++ = *s++;
    }
  }
  *p = NULLCHAR;
  return retbuf;
}

/* Remove all highlighting escape sequences in s */
char *StripHighlight (char *s)
{
  static char retbuf[MSG_SIZ];
  char *p = retbuf;

  while (*s != NULLCHAR) {
    while (*s == '\033') {
      while (*s != NULLCHAR && !isalpha(*s)) s++;
      if (*s != NULLCHAR) s++;
    }
    while (*s != NULLCHAR && *s != '\033') {
      *p++ = *s++;
    }
  }
  *p = NULLCHAR;
  return retbuf;
}

char engineVariant[MSG_SIZ];
char *variantNames[] = VARIANT_NAMES;
char *VariantName (VariantClass v)
{
  if(v == VariantUnknown || *engineVariant) return engineVariant;
  return variantNames[v];
}


/* Identify a variant from the strings the chess servers use or the
   PGN Variant tag names we use. */
VariantClass StringToVariant (char *e)
{
  char *p;
  int wnum = -1;
  VariantClass v = VariantNormal;
  int i, found = FALSE;
  char buf[MSG_SIZ], c;
  int len;

  if (!e) return v;

  /* [HGM] skip over optional board-size prefixes */
  if( sscanf(e, "%dx%d_%c", &i, &i, &c) == 3 ||
      sscanf(e, "%dx%d+%d_%c", &i, &i, &i, &c) == 4 ) {
    while( *e++ != '_');
  }

  if(StrCaseStr(e, "misc/")) { // [HGM] on FICS, misc/shogi is not shogi
    v = VariantNormal;
    found = TRUE;
  } else
    for (i=0; i<sizeof(variantNames)/sizeof(char*); i++) {
      if (p = StrCaseStr(e, variantNames[i])) {
        if(p && i >= VariantShogi && (p != e && !appData.icsActive || isalpha(p[strlen(variantNames[i])]))) continue;
        v = (VariantClass) i;
        found = TRUE;
        break;
      }
    }

  if (!found) {
    if ((StrCaseStr(e, "fischer") && StrCaseStr(e, "random"))
        || StrCaseStr(e, "wild/fr")
        || StrCaseStr(e, "frc") || StrCaseStr(e, "960")) {
      v = VariantFischeRandom;
    } else if ((i = 4, p = StrCaseStr(e, "wild")) ||
        (i = 1, p = StrCaseStr(e, "w"))) {
      p += i;
      while (*p && (isspace(*p) || *p == '(' || *p == '/')) p++;
      if (isdigit(*p)) {
        wnum = atoi(p);
      } else {
        wnum = -1;
      }
      switch (wnum) {
        case 0: /* FICS only, actually */
        case 1:
          /* Castling legal even if K starts on d-file */
          v = VariantWildCastle;
          break;
        case 2:
        case 3:
        case 4:
          /* Castling illegal even if K & R happen to start in
             normal positions. */
          v = VariantNoCastle;
          break;
        case 5:
        case 7:
        case 8:
        case 10:
        case 11:
        case 12:
        case 13:
        case 14:
        case 15:
        case 18:
        case 19:
          /* Castling legal iff K & R start in normal positions */
          v = VariantNormal;
          break;
        case 6:
        case 20:
        case 21:
          /* Special wilds for position setup; unclear what to do here */
          v = VariantLoadable;
          break;
        case 9:
          /* Bizarre ICC game */
          v = VariantTwoKings;
          break;
        case 16:
          v = VariantKriegspiel;
          break;
        case 17:
          v = VariantLosers;
          break;
        case 22:
          v = VariantFischeRandom;
          break;
        case 23:
          v = VariantCrazyhouse;
          break;
        case 24:
          v = VariantBughouse;
          break;
        case 25:
          v = Variant3Check;
          break;
        case 26:
          /* Not quite the same as FICS suicide! */
          v = VariantGiveaway;
          break;
        case 27:
          v = VariantAtomic;
          break;
        case 28:
          v = VariantShatranj;
          break;

          /* Temporary names for future ICC types.  The name *will* change in
             the next xboard/WinBoard release after ICC defines it. */
        case 29:
          v = Variant29;
          break;
        case 30:
          v = Variant30;
          break;
        case 31:
          v = Variant31;
          break;
        case 32:
          v = Variant32;
          break;
        case 33:
          v = Variant33;
          break;
        case 34:
          v = Variant34;
          break;
        case 35:
          v = Variant35;
          break;
        case 36:
          v = Variant36;
          break;
        case 37:
          v = VariantShogi;
          break;
        case 38:
          v = VariantXiangqi;
          break;
        case 39:
          v = VariantCourier;
          break;
        case 40:
          v = VariantGothic;
          break;
        case 41:
          v = VariantCapablanca;
          break;
        case 42:
          v = VariantKnightmate;
          break;
        case 43:
          v = VariantFairy;
          break;
        case 44:
          v = VariantCylinder;
          break;
        case 45:
          v = VariantFalcon;
          break;
        case 46:
          v = VariantCapaRandom;
          break;
        case 47:
          v = VariantBerolina;
          break;
        case 48:
          v = VariantJanus;
          break;
        case 49:
          v = VariantSuper;
          break;
        case 50:
          v = VariantGreat;
          break;
        case -1:
          /* Found "wild" or "w" in the string but no number;
             must assume it's normal chess. */
          v = VariantNormal;
          break;
        default:
          len = snprintf(buf, MSG_SIZ, _("Unknown wild type %d"), wnum);
          if( (len >= MSG_SIZ) && appData.debugMode )
            fprintf(debugFP, "StringToVariant: buffer truncated.\n");

          DisplayError(buf, 0);
          v = VariantUnknown;
          break;
      }
    }
  }
  if (appData.debugMode) {
    fprintf(debugFP, "recognized '%s' (%d) as variant %s\n",
        e, wnum, VariantName(v));
  }
  return v;
}

static int leftover_start = 0, leftover_len = 0;
char star_match[STAR_MATCH_N][MSG_SIZ];

/* Test whether pattern is present at &buf[*index]; if so, return TRUE,
   advance *index beyond it, and set leftover_start to the new value of
 *index; else return FALSE.  If pattern contains the character '*', it
 matches any sequence of characters not containing '\r', '\n', or the
 character following the '*' (if any), and the matched sequence(s) are
 copied into star_match.
 */
int looking_at ( char *buf, int *index, char *pattern)
{
  char *bufp = &buf[*index], *patternp = pattern;
  int star_count = 0;
  char *matchp = star_match[0];

  for (;;) {
    if (*patternp == NULLCHAR) {
      *index = leftover_start = bufp - buf;
      *matchp = NULLCHAR;
      return TRUE;
    }
    if (*bufp == NULLCHAR) return FALSE;
    if (*patternp == '*') {
      if (*bufp == *(patternp + 1)) {
        *matchp = NULLCHAR;
        matchp = star_match[++star_count];
        patternp += 2;
        bufp++;
        continue;
      } else if (*bufp == '\n' || *bufp == '\r') {
        patternp++;
        if (*patternp == NULLCHAR)
          continue;
        else
          return FALSE;
      } else {
        *matchp++ = *bufp++;
        continue;
      }
    }
    if (*patternp != *bufp) return FALSE;
    patternp++;
    bufp++;
  }
}

void SendToPlayer (char *data, int length)
{
  int error, outCount;
  outCount = OutputToProcess(NoProc, data, length, &error);
  if (outCount < length) {
    DisplayFatalError(_("Error writing to display"), error, 1);
  }
}

void PackHolding (char packed[], char *holding)
{
  char *p = holding;
  char *q = packed;
  int runlength = 0;
  int curr = 9999;
  do {
    if (*p == curr) {
      runlength++;
    } else {
      switch (runlength) {
        case 0:
          break;
        case 1:
          *q++ = curr;
          break;
        case 2:
          *q++ = curr;
          *q++ = curr;
          break;
        default:
          sprintf(q, "%d", runlength);
          while (*q) q++;
          *q++ = curr;
          break;
      }
      runlength = 1;
      curr = *p;
    }
  } while (*p++);
  *q = NULLCHAR;
}

/* Telnet protocol requests from the front end */
  void
TelnetRequest (unsigned char ddww, unsigned char option)
{
  unsigned char msg[3];
  int outCount, outError;

  if (*appData.icsCommPort != NULLCHAR || appData.useTelnet) return;

  if (appData.debugMode) {
    char buf1[8], buf2[8], *ddwwStr, *optionStr;
    switch (ddww) {
      case TN_DO:
        ddwwStr = "DO";
        break;
      case TN_DONT:
        ddwwStr = "DONT";
        break;
      case TN_WILL:
        ddwwStr = "WILL";
        break;
      case TN_WONT:
        ddwwStr = "WONT";
        break;
      default:
        ddwwStr = buf1;
        snprintf(buf1,sizeof(buf1)/sizeof(buf1[0]), "%d", ddww);
        break;
    }
    switch (option) {
      case TN_ECHO:
        optionStr = "ECHO";
        break;
      default:
        optionStr = buf2;
        snprintf(buf2,sizeof(buf2)/sizeof(buf2[0]), "%d", option);
        break;
    }
    fprintf(debugFP, ">%s %s ", ddwwStr, optionStr);
  }
  msg[0] = TN_IAC;
  msg[1] = ddww;
  msg[2] = option;
  outCount = OutputToProcess(icsPR, (char *)msg, 3, &outError);
  if (outCount < 3) {
    DisplayFatalError(_("Error writing to ICS"), outError, 1);
  }
}

void DoEcho ()
{
  if (!appData.icsActive) return;
  TelnetRequest(TN_DO, TN_ECHO);
}

void DontEcho ()
{
  if (!appData.icsActive) return;
  TelnetRequest(TN_DONT, TN_ECHO);
}

void CopyHoldings (Board board, char *holdings, ChessSquare lowestPiece)
{
  /* put the holdings sent to us by the server on the board holdings area */
  int i, j, holdingsColumn, holdingsStartRow, direction, countsColumn;
  char p;
  ChessSquare piece;

  if(gameInfo.holdingsWidth < 2)  return;
  if(gameInfo.variant != VariantBughouse && board[HOLDINGS_SET])
    return; // prevent overwriting by pre-board holdings

  if( (int)lowestPiece >= BlackPawn ) {
    holdingsColumn = 0;
    countsColumn = 1;
    holdingsStartRow = BOARD_HEIGHT-1;
    direction = -1;
  } else {
    holdingsColumn = BOARD_WIDTH-1;
    countsColumn = BOARD_WIDTH-2;
    holdingsStartRow = 0;
    direction = 1;
  }

  for(i=0; i<BOARD_HEIGHT; i++) { /* clear holdings */
    board[i][holdingsColumn] = EmptySquare;
    board[i][countsColumn]   = (ChessSquare) 0;
  }
  while( (p=*holdings++) != NULLCHAR ) {
    piece = CharToPiece( ToUpper(p) );
    if(piece == EmptySquare) continue;
    /*j = (int) piece - (int) WhitePawn;*/
    j = PieceToNumber(piece);
    if(j >= gameInfo.holdingsSize) continue; /* ignore pieces that do not fit */
    if(j < 0) continue;               /* should not happen */
    piece = (ChessSquare) ( (int)piece + (int)lowestPiece );
    board[holdingsStartRow+j*direction][holdingsColumn] = piece;
    board[holdingsStartRow+j*direction][countsColumn]++;
  }
}


void VariantSwitch (Board board, VariantClass newVariant)
{
  int newHoldingsWidth, newWidth = 8, newHeight = 8, i, j;
  static Board oldBoard;

  startedFromPositionFile = FALSE;
  if(gameInfo.variant == newVariant) return;

  /* [HGM] This routine is called each time an assignment is made to
   * gameInfo.variant during a game, to make sure the board sizes
   * are set to match the new variant. If that means adding or deleting
   * holdings, we shift the playing board accordingly
   * This kludge is needed because in ICS observe mode, we get boards
   * of an ongoing game without knowing the variant, and learn about the
   * latter only later. This can be because of the move list we requested,
   * in which case the game history is refilled from the beginning anyway,
   * but also when receiving holdings of a crazyhouse game. In the latter
   * case we want to add those holdings to the already received position.
   */


  if (appData.debugMode) {
    fprintf(debugFP, "Switch board from %s to %s\n",
        VariantName(gameInfo.variant), VariantName(newVariant));
    setbuf(debugFP, NULL);
  }
  shuffleOpenings = 0;       /* [HGM] shuffle */
  gameInfo.holdingsSize = 5; /* [HGM] prepare holdings */
  switch(newVariant)
  {
    case VariantShogi:
      newWidth = 9;  newHeight = 9;
      gameInfo.holdingsSize = 7;
    case VariantBughouse:
    case VariantCrazyhouse:
      newHoldingsWidth = 2; break;
    case VariantGreat:
      newWidth = 10;
    case VariantSuper:
      newHoldingsWidth = 2;
      gameInfo.holdingsSize = 8;
      break;
    case VariantGothic:
    case VariantCapablanca:
    case VariantCapaRandom:
      newWidth = 10;
    default:
      newHoldingsWidth = gameInfo.holdingsSize = 0;
  };

  if(newWidth  != gameInfo.boardWidth  ||
      newHeight != gameInfo.boardHeight ||
      newHoldingsWidth != gameInfo.holdingsWidth ) {

    /* shift position to new playing area, if needed */
    if(newHoldingsWidth > gameInfo.holdingsWidth) {
      for(i=0; i<BOARD_HEIGHT; i++)
        for(j=BOARD_RGHT-1; j>=BOARD_LEFT; j--)
          board[i][j+newHoldingsWidth-gameInfo.holdingsWidth] =
            board[i][j];
      for(i=0; i<newHeight; i++) {
        board[i][0] = board[i][newWidth+2*newHoldingsWidth-1] = EmptySquare;
        board[i][1] = board[i][newWidth+2*newHoldingsWidth-2] = (ChessSquare) 0;
      }
    } else if(newHoldingsWidth < gameInfo.holdingsWidth) {
      for(i=0; i<BOARD_HEIGHT; i++)
        for(j=BOARD_LEFT; j<BOARD_RGHT; j++)
          board[i][j+newHoldingsWidth-gameInfo.holdingsWidth] =
            board[i][j];
    }
    board[HOLDINGS_SET] = 0;
    gameInfo.boardWidth  = newWidth;
    gameInfo.boardHeight = newHeight;
    gameInfo.holdingsWidth = newHoldingsWidth;
    gameInfo.variant = newVariant;
    InitDrawingSizes(-2, 0);
  } else gameInfo.variant = newVariant;
  CopyBoard(oldBoard, board);   // remember correctly formatted board
  InitPosition(FALSE);          /* this sets up board[0], but also other stuff        */
  DrawPosition(TRUE, currentMove ? boards[currentMove] : oldBoard);
}

static int loggedOn = FALSE;

/*-- Game start info cache: --*/
int gs_gamenum;
char gs_kind[MSG_SIZ];
static char player1Name[128] = "";
static char player2Name[128] = "";
static char cont_seq[] = "\n\\   ";
static int player1Rating = -1;
static int player2Rating = -1;
/*----------------------------*/

ColorClass curColor = ColorNormal;
int suppressKibitz = 0;

// [HGM] seekgraph
Boolean soughtPending = FALSE;
Boolean seekGraphUp;
#define MAX_SEEK_ADS 200
#define SQUARE 0x80
char *seekAdList[MAX_SEEK_ADS];
int ratingList[MAX_SEEK_ADS], xList[MAX_SEEK_ADS], yList[MAX_SEEK_ADS], seekNrList[MAX_SEEK_ADS], zList[MAX_SEEK_ADS];
float tcList[MAX_SEEK_ADS];
char colorList[MAX_SEEK_ADS];
int nrOfSeekAds = 0;
int minRating = 1010, maxRating = 2800;
int hMargin = 10, vMargin = 20, h, w;
extern int squareSize, lineGap;

void PlotSeekAd (int i)
{
  int x, y, color = 0, r = ratingList[i]; float tc = tcList[i];
  xList[i] = yList[i] = -100; // outside graph, so cannot be clicked
  if(r < minRating+100 && r >=0 ) r = minRating+100;
  if(r > maxRating) r = maxRating;
  if(tc < 1.f) tc = 1.f;
  if(tc > 95.f) tc = 95.f;
  x = (w-hMargin-squareSize/8-7)* log(tc)/log(95.) + hMargin;
  y = ((double)r - minRating)/(maxRating - minRating)
    * (h-vMargin-squareSize/8-1) + vMargin;
  if(ratingList[i] < 0) y = vMargin + squareSize/4;
  if(strstr(seekAdList[i], " u ")) color = 1;
  if(!strstr(seekAdList[i], "lightning") && // for now all wilds same color
      !strstr(seekAdList[i], "bullet") &&
      !strstr(seekAdList[i], "blitz") &&
      !strstr(seekAdList[i], "standard") ) color = 2;
  if(strstr(seekAdList[i], "(C) ")) color |= SQUARE; // plot computer seeks as squares
  DrawSeekDot(xList[i]=x+3*(color&~SQUARE), yList[i]=h-1-y, colorList[i]=color);
}

void PlotSingleSeekAd (int i)
{
  PlotSeekAd(i);
}

void AddAd (char *handle, char *rating, int base, int inc,  char rated, char *type, int nr, Boolean plot)
{
  char buf[MSG_SIZ], *ext = "";
  VariantClass v = StringToVariant(type);
  if(strstr(type, "wild")) {
    ext = type + 4; // append wild number
    if(v == VariantFischeRandom) type = "chess960"; else
      if(v == VariantLoadable) type = "setup"; else
        type = VariantName(v);
  }
  snprintf(buf, MSG_SIZ, "%s (%s) %d %d %c %s%s", handle, rating, base, inc, rated, type, ext);
  if(nrOfSeekAds < MAX_SEEK_ADS-1) {
    if(seekAdList[nrOfSeekAds]) free(seekAdList[nrOfSeekAds]);
    ratingList[nrOfSeekAds] = -1; // for if seeker has no rating
    sscanf(rating, "%d", &ratingList[nrOfSeekAds]);
    tcList[nrOfSeekAds] = base + (2./3.)*inc;
    seekNrList[nrOfSeekAds] = nr;
    zList[nrOfSeekAds] = 0;
    seekAdList[nrOfSeekAds++] = StrSave(buf);
    if(plot) PlotSingleSeekAd(nrOfSeekAds-1);
  }
}

void EraseSeekDot (int i)
{
  int x = xList[i], y = yList[i], d=squareSize/4, k;
  DrawSeekBackground(x-squareSize/8, y-squareSize/8, x+squareSize/8+1, y+squareSize/8+1);
  if(x < hMargin+d) DrawSeekAxis(hMargin, y-squareSize/8, hMargin, y+squareSize/8+1);
  // now replot every dot that overlapped
  for(k=0; k<nrOfSeekAds; k++) if(k != i) {
    int xx = xList[k], yy = yList[k];
    if(xx <= x+d && xx > x-d && yy <= y+d && yy > y-d)
      DrawSeekDot(xx, yy, colorList[k]);
  }
}

void RemoveSeekAd (int nr)
{
  int i;
  for(i=0; i<nrOfSeekAds; i++) if(seekNrList[i] == nr) {
    EraseSeekDot(i);
    if(seekAdList[i]) free(seekAdList[i]);
    seekAdList[i] = seekAdList[--nrOfSeekAds];
    seekNrList[i] = seekNrList[nrOfSeekAds];
    ratingList[i] = ratingList[nrOfSeekAds];
    colorList[i]  = colorList[nrOfSeekAds];
    tcList[i] = tcList[nrOfSeekAds];
    xList[i]  = xList[nrOfSeekAds];
    yList[i]  = yList[nrOfSeekAds];
    zList[i]  = zList[nrOfSeekAds];
    seekAdList[nrOfSeekAds] = NULL;
    break;
  }
}

Boolean MatchSoughtLine (char *line)
{
  char handle[MSG_SIZ], rating[MSG_SIZ], type[MSG_SIZ];
  int nr, base, inc, u=0; char dummy;

  if(sscanf(line, "%d %s %s %d %d rated %s", &nr, rating, handle, &base, &inc, type) == 6 ||
      sscanf(line, "%d %s %s %s %d %d rated %c", &nr, rating, handle, type, &base, &inc, &dummy) == 7 ||
      (u=1) &&
      (sscanf(line, "%d %s %s %d %d unrated %s", &nr, rating, handle, &base, &inc, type) == 6 ||
       sscanf(line, "%d %s %s %s %d %d unrated %c", &nr, rating, handle, type, &base, &inc, &dummy) == 7)  ) {
    // match: compact and save the line
    AddAd(handle, rating, base, inc, u ? 'u' : 'r', type, nr, FALSE);
    return TRUE;
  }
  return FALSE;
}

int DrawSeekGraph ()
{
  int i;
  if(!seekGraphUp) return FALSE;
  h = BOARD_HEIGHT * (squareSize + lineGap) + lineGap + 2*border;
  w = BOARD_WIDTH  * (squareSize + lineGap) + lineGap + 2*border;

  DrawSeekBackground(0, 0, w, h);
  DrawSeekAxis(hMargin, h-1-vMargin, w-5, h-1-vMargin);
  DrawSeekAxis(hMargin, h-1-vMargin, hMargin, 5);
  for(i=0; i<4000; i+= 100) if(i>=minRating && i<maxRating) {
    int yy =((double)i - minRating)/(maxRating - minRating)*(h-vMargin-squareSize/8-1) + vMargin;
    yy = h-1-yy;
    DrawSeekAxis(hMargin-5, yy, hMargin+5*(i%500==0), yy); // rating ticks
    if(i%500 == 0) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "%d", i);
      DrawSeekText(buf, hMargin+squareSize/8+7, yy);
    }
  }
  DrawSeekText("unrated", hMargin+squareSize/8+7, h-1-vMargin-squareSize/4);
  for(i=1; i<100; i+=(i<10?1:5)) {
    int xx = (w-hMargin-squareSize/8-7)* log((double)i)/log(95.) + hMargin;
    DrawSeekAxis(xx, h-1-vMargin, xx, h-6-vMargin-3*(i%10==0)); // TC ticks
    if(i<=5 || (i>40 ? i%20 : i%10) == 0) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "%d", i);
      DrawSeekText(buf, xx-2-3*(i>9), h-1-vMargin/2);
    }
  }
  for(i=0; i<nrOfSeekAds; i++) PlotSeekAd(i);
  return TRUE;
}

int SeekGraphClick (ClickType click, int x, int y, int moving)
{
  static int lastDown = 0, displayed = 0, lastSecond;
  if(y < 0) return FALSE;
  if(!(appData.seekGraph && appData.icsActive && loggedOn &&
        (gameMode == BeginningOfGame || gameMode == IcsIdle))) {
    if(!seekGraphUp) return FALSE;
    seekGraphUp = FALSE; // seek graph is up when it shouldn't be: take it down
    DrawPosition(TRUE, NULL);
    return TRUE;
  }
  if(!seekGraphUp) { // initiate cration of seek graph by requesting seek-ad list
    if(click == Release || moving) return FALSE;
    nrOfSeekAds = 0;
    soughtPending = TRUE;
    SendToICS(ics_prefix);
    SendToICS("sought\n"); // should this be "sought all"?
  } else { // issue challenge based on clicked ad
    int dist = 10000; int i, closest = 0, second = 0;
    for(i=0; i<nrOfSeekAds; i++) {
      int d = (x-xList[i])*(x-xList[i]) +  (y-yList[i])*(y-yList[i]) + zList[i];
      if(d < dist) { dist = d; closest = i; }
      second += (d - zList[i] < 120); // count in-range ads
      if(click == Press && moving != 1 && zList[i]>0) zList[i] *= 0.8; // age priority
    }
    if(dist < 120) {
      char buf[MSG_SIZ];
      second = (second > 1);
      if(displayed != closest || second != lastSecond) {
        DisplayMessage(second ? "!" : "", seekAdList[closest]);
        lastSecond = second; displayed = closest;
      }
      if(click == Press) {
        if(moving == 2) zList[closest] = 100; // right-click; push to back on press
        lastDown = closest;
        return TRUE;
      } // on press 'hit', only show info
      if(moving == 2) return TRUE; // ignore right up-clicks on dot
      snprintf(buf, MSG_SIZ, "play %d\n", seekNrList[closest]);
      SendToICS(ics_prefix);
      SendToICS(buf);
      return TRUE; // let incoming board of started game pop down the graph
    } else if(click == Release) { // release 'miss' is ignored
      zList[lastDown] = 100; // make future selection of the rejected ad more difficult
      if(moving == 2) { // right up-click
        nrOfSeekAds = 0; // refresh graph
        soughtPending = TRUE;
        SendToICS(ics_prefix);
        SendToICS("sought\n"); // should this be "sought all"?
      }
      return TRUE;
    } else if(moving) { if(displayed >= 0) DisplayMessage("", ""); displayed = -1; return TRUE; }
    // press miss or release hit 'pop down' seek graph
    seekGraphUp = FALSE;
    DrawPosition(TRUE, NULL);
  }
  return TRUE;
}

void read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int error)
{
#define BUF_SIZE (16*1024) /* overflowed at 8K with "inchannel 1" on FICS? */
#define STARTED_NONE 0
#define STARTED_MOVES 1
#define STARTED_BOARD 2
#define STARTED_OBSERVE 3
#define STARTED_HOLDINGS 4
#define STARTED_CHATTER 5
#define STARTED_COMMENT 6
#define STARTED_MOVES_NOHIDE 7

  static int started = STARTED_NONE;
  static char parse[20000];
  static int parse_pos = 0;
  static char buf[BUF_SIZE + 1];
  static int firstTime = TRUE, intfSet = FALSE;
  static ColorClass prevColor = ColorNormal;
  static int savingComment = FALSE;
  static int cmatch = 0; // continuation sequence match
  char *bp;
  char str[MSG_SIZ];
  int i, oldi;
  int buf_len;
  int next_out;
  int tkind;
  int backup;    /* [DM] For zippy color lines */
  char *p;
  char talker[MSG_SIZ]; // [HGM] chat
  int channel, collective=0;

  connectionAlive = TRUE; // [HGM] alive: I think, therefore I am...

  if (appData.debugMode) {
    if (!error) {
      fprintf(debugFP, "<ICS: ");
      show_bytes(debugFP, data, count);
      fprintf(debugFP, "\n");
    }
  }

  if (appData.debugMode) { int f = forwardMostMove;
    fprintf(debugFP, "ics input %d, castling = %d %d %d %d %d %d\n", f,
        boards[f][CASTLING][0],boards[f][CASTLING][1],boards[f][CASTLING][2],
        boards[f][CASTLING][3],boards[f][CASTLING][4],boards[f][CASTLING][5]);
  }
  if (count > 0) {
    /* If last read ended with a partial line that we couldn't parse,
       prepend it to the new read and try again. */
    if (leftover_len > 0) {
      for (i=0; i<leftover_len; i++)
        buf[i] = buf[leftover_start + i];
    }

    /* copy new characters into the buffer */
    bp = buf + leftover_len;
    buf_len=leftover_len;
    for (i=0; i<count; i++)
    {
      // ignore these
      if (data[i] == '\r')
        continue;

      // join lines split by ICS?
      if (!appData.noJoin)
      {
        /*
           Joining just consists of finding matches against the
           continuation sequence, and discarding that sequence
           if found instead of copying it.  So, until a match
           fails, there's nothing to do since it might be the
           complete sequence, and thus, something we don't want
           copied.
           */
        if (data[i] == cont_seq[cmatch])
        {
          cmatch++;
          if (cmatch == strlen(cont_seq))
          {
            cmatch = 0; // complete match.  just reset the counter

            /*
               it's possible for the ICS to not include the space
               at the end of the last word, making our [correct]
               join operation fuse two separate words.  the server
               does this when the space occurs at the width setting.
               */
            if (!buf_len || buf[buf_len-1] != ' ')
            {
              *bp++ = ' ';
              buf_len++;
            }
          }
          continue;
        }
        else if (cmatch)
        {
          /*
             match failed, so we have to copy what matched before
             falling through and copying this character.  In reality,
             this will only ever be just the newline character, but
             it doesn't hurt to be precise.
             */
          strncpy(bp, cont_seq, cmatch);
          bp += cmatch;
          buf_len += cmatch;
          cmatch = 0;
        }
      }

      // copy this char
      *bp++ = data[i];
      buf_len++;
    }

    buf[buf_len] = NULLCHAR;
    //	next_out = leftover_len; // [HGM] should we set this to 0, and not print it in advance?
    next_out = 0;
    leftover_start = 0;

    i = 0;
    while (i < buf_len) {
      /* Deal with part of the TELNET option negotiation
         protocol.  We refuse to do anything beyond the
         defaults, except that we allow the WILL ECHO option,
         which ICS uses to turn off password echoing when we are
         directly connected to it.  We reject this option
         if localLineEditing mode is on (always on in xboard)
         and we are talking to port 23, which might be a real
         telnet server that will try to keep WILL ECHO on permanently.
         */
      if (buf_len - i >= 3 && (unsigned char) buf[i] == TN_IAC) {
        static int remoteEchoOption = FALSE; /* telnet ECHO option */
        unsigned char option;
        oldi = i;
        switch ((unsigned char) buf[++i]) {
          case TN_WILL:
            if (appData.debugMode)
              fprintf(debugFP, "\n<WILL ");
            switch (option = (unsigned char) buf[++i]) {
              case TN_ECHO:
                if (appData.debugMode)
                  fprintf(debugFP, "ECHO ");
                /* Reply only if this is a change, according
                   to the protocol rules. */
                if (remoteEchoOption) break;
                if (appData.localLineEditing &&
                    atoi(appData.icsPort) == TN_PORT) {
                  TelnetRequest(TN_DONT, TN_ECHO);
                } else {
                  EchoOff();
                  TelnetRequest(TN_DO, TN_ECHO);
                  remoteEchoOption = TRUE;
                }
                break;
              default:
                if (appData.debugMode)
                  fprintf(debugFP, "%d ", option);
                /* Whatever this is, we don't want it. */
                TelnetRequest(TN_DONT, option);
                break;
            }
            break;
          case TN_WONT:
            if (appData.debugMode)
              fprintf(debugFP, "\n<WONT ");
            switch (option = (unsigned char) buf[++i]) {
              case TN_ECHO:
                if (appData.debugMode)
                  fprintf(debugFP, "ECHO ");
                /* Reply only if this is a change, according
                   to the protocol rules. */
                if (!remoteEchoOption) break;
                EchoOn();
                TelnetRequest(TN_DONT, TN_ECHO);
                remoteEchoOption = FALSE;
                break;
              default:
                if (appData.debugMode)
                  fprintf(debugFP, "%d ", (unsigned char) option);
                /* Whatever this is, it must already be turned
                   off, because we never agree to turn on
                   anything non-default, so according to the
                   protocol rules, we don't reply. */
                break;
            }
            break;
          case TN_DO:
            if (appData.debugMode)
              fprintf(debugFP, "\n<DO ");
            switch (option = (unsigned char) buf[++i]) {
              default:
                /* Whatever this is, we refuse to do it. */
                if (appData.debugMode)
                  fprintf(debugFP, "%d ", option);
                TelnetRequest(TN_WONT, option);
                break;
            }
            break;
          case TN_DONT:
            if (appData.debugMode)
              fprintf(debugFP, "\n<DONT ");
            switch (option = (unsigned char) buf[++i]) {
              default:
                if (appData.debugMode)
                  fprintf(debugFP, "%d ", option);
                /* Whatever this is, we are already not doing
                   it, because we never agree to do anything
                   non-default, so according to the protocol
                   rules, we don't reply. */
                break;
            }
            break;
          case TN_IAC:
            if (appData.debugMode)
              fprintf(debugFP, "\n<IAC ");
            /* Doubled IAC; pass it through */
            i--;
            break;
          default:
            if (appData.debugMode)
              fprintf(debugFP, "\n<%d ", (unsigned char) buf[i]);
            /* Drop all other telnet commands on the floor */
            break;
        }
        if (oldi > next_out)
          SendToPlayer(&buf[next_out], oldi - next_out);
        if (++i > next_out)
          next_out = i;
        continue;
      }

      /* OK, this at least will *usually* work */
      if (!loggedOn && looking_at(buf, &i, "ics%")) {
        loggedOn = TRUE;
      }

      if (loggedOn && !intfSet) {
        if (ics_type == ICS_ICC) {
          snprintf(str, MSG_SIZ,
              "/set-quietly interface %s\n/set-quietly style 12\n",
              programVersion);
          if(appData.seekGraph && appData.autoRefresh) // [HGM] seekgraph
            strcat(str, "/set-2 51 1\n/set seek 1\n");
        } else if (ics_type == ICS_CHESSNET) {
          snprintf(str, MSG_SIZ, "/style 12\n");
        } else {
          safeStrCpy(str, "alias $ @\n$set interface ", sizeof(str)/sizeof(str[0]));
          strcat(str, programVersion);
          strcat(str, "\n$iset startpos 1\n$iset ms 1\n");
          if(appData.seekGraph && appData.autoRefresh) // [HGM] seekgraph
            strcat(str, "$iset seekremove 1\n$set seek 1\n");
#ifdef WIN32
          strcat(str, "$iset nohighlight 1\n");
#endif
          strcat(str, "$iset lock 1\n$style 12\n");
        }
        SendToICS(str);
        NotifyFrontendLogin();
        intfSet = TRUE;
      }

      if (started == STARTED_COMMENT) {
        /* Accumulate characters in comment */
        parse[parse_pos++] = buf[i];
        if (buf[i] == '\n') {
          parse[parse_pos] = NULLCHAR;
          if(chattingPartner>=0) {
            char mess[MSG_SIZ];
            snprintf(mess, MSG_SIZ, "%s%s", talker, parse);
            OutputChatMessage(chattingPartner, mess);
            if(collective == 1) { // broadcasted talk also goes to private chatbox of talker
              int p;
              talker[strlen(talker+1)-1] = NULLCHAR; // strip closing delimiter
              for(p=0; p<MAX_CHAT; p++) if(!StrCaseCmp(talker+1, chatPartner[p])) {
                snprintf(mess, MSG_SIZ, "%s: %s", chatPartner[chattingPartner], parse);
                OutputChatMessage(p, mess);
                break;
              }
            }
            chattingPartner = -1;
            if(collective != 3) next_out = i+1; // [HGM] suppress printing in ICS window
            collective = 0;
          } else
            if(!suppressKibitz) // [HGM] kibitz
              AppendComment(forwardMostMove, StripHighlight(parse), TRUE);
            else { // [HGM kibitz: divert memorized engine kibitz to engine-output window
              int nrDigit = 0, nrAlph = 0, j;
              if(parse_pos > MSG_SIZ - 30) // defuse unreasonably long input
              { parse_pos = MSG_SIZ-30; parse[parse_pos - 1] = '\n'; }
              parse[parse_pos] = NULLCHAR;
              // try to be smart: if it does not look like search info, it should go to
              // ICS interaction window after all, not to engine-output window.
              for(j=0; j<parse_pos; j++) { // count letters and digits
                nrDigit += (parse[j] >= '0' && parse[j] <= '9');
                nrAlph  += (parse[j] >= 'a' && parse[j] <= 'z');
                nrAlph  += (parse[j] >= 'A' && parse[j] <= 'Z');
              }
              if(nrAlph < 9*nrDigit) { // if more than 10% digit we assume search info
                int depth=0; float score;
                if(sscanf(parse, "!!! %f/%d", &score, &depth) == 2 && depth>0) {
                  // [HGM] kibitz: save kibitzed opponent info for PGN and eval graph
                  pvInfoList[forwardMostMove-1].depth = depth;
                  pvInfoList[forwardMostMove-1].score = 100*score;
                }
                OutputKibitz(suppressKibitz, parse);
              } else {
                char tmp[MSG_SIZ];
                if(gameMode == IcsObserving) // restore original ICS messages
                  /* TRANSLATORS: to 'kibitz' is to send a message to all players and the game observers */
                  snprintf(tmp, MSG_SIZ, "%s kibitzes: %s", star_match[0], parse);
                else
                  /* TRANSLATORS: to 'kibitz' is to send a message to all players and the game observers */
                  snprintf(tmp, MSG_SIZ, _("your opponent kibitzes: %s"), parse);
                SendToPlayer(tmp, strlen(tmp));
              }
              next_out = i+1; // [HGM] suppress printing in ICS window
            }
          started = STARTED_NONE;
        } else {
          /* Don't match patterns against characters in comment */
          i++;
          continue;
        }
      }
      if (started == STARTED_CHATTER) {
        if (buf[i] != '\n') {
          /* Don't match patterns against characters in chatter */
          i++;
          continue;
        }
        started = STARTED_NONE;
        if(suppressKibitz) next_out = i+1;
      }

      /* Kludge to deal with rcmd protocol */
      if (firstTime && looking_at(buf, &i, "\001*")) {
        DisplayFatalError(&buf[1], 0, 1);
        continue;
      } else {
        firstTime = FALSE;
      }

      if (!loggedOn && looking_at(buf, &i, "chessclub.com")) {
        ics_type = ICS_ICC;
        ics_prefix = "/";
        if (appData.debugMode)
          fprintf(debugFP, "ics_type %d\n", ics_type);
        continue;
      }
      if (!loggedOn && looking_at(buf, &i, "freechess.org")) {
        ics_type = ICS_FICS;
        ics_prefix = "$";
        if (appData.debugMode)
          fprintf(debugFP, "ics_type %d\n", ics_type);
        continue;
      }
      if (!loggedOn && looking_at(buf, &i, "chess.net")) {
        ics_type = ICS_CHESSNET;
        ics_prefix = "/";
        if (appData.debugMode)
          fprintf(debugFP, "ics_type %d\n", ics_type);
        continue;
      }

      if (!loggedOn &&
          (looking_at(buf, &i, "\"*\" is *a registered name") ||
           looking_at(buf, &i, "Logging you in as \"*\"") ||
           looking_at(buf, &i, "will be \"*\""))) {
        safeStrCpy(ics_handle, star_match[0], sizeof(ics_handle)/sizeof(ics_handle[0]));
        continue;
      }

      if (loggedOn && !have_set_title && ics_handle[0] != NULLCHAR) {
        char buf[MSG_SIZ];
        snprintf(buf, sizeof(buf), "%s@%s", ics_handle, appData.icsHost);
        DisplayIcsInteractionTitle(buf);
        have_set_title = TRUE;
      }

      /* skip finger notes */
      if (started == STARTED_NONE &&
          ((buf[i] == ' ' && isdigit(buf[i+1])) ||
           (buf[i] == '1' && buf[i+1] == '0')) &&
          buf[i+2] == ':' && buf[i+3] == ' ') {
        started = STARTED_CHATTER;
        i += 3;
        continue;
      }

      oldi = i;
      // [HGM] seekgraph: recognize sought lines and end-of-sought message
      if(appData.seekGraph) {
        if(soughtPending && MatchSoughtLine(buf+i)) {
          i = strstr(buf+i, "rated") - buf;
          if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
          next_out = leftover_start = i;
          started = STARTED_CHATTER;
          suppressKibitz = TRUE;
          continue;
        }
        if((gameMode == IcsIdle || gameMode == BeginningOfGame)
            && looking_at(buf, &i, "* ads displayed")) {
          soughtPending = FALSE;
          seekGraphUp = TRUE;
          DrawSeekGraph();
          continue;
        }
        if(appData.autoRefresh) {
          if(looking_at(buf, &i, "* (*) seeking * * * * *\"play *\" to respond)\n")) {
            int s = (ics_type == ICS_ICC); // ICC format differs
            if(seekGraphUp)
              AddAd(star_match[0], star_match[1], atoi(star_match[2+s]), atoi(star_match[3+s]),
                  star_match[4+s][0], star_match[5-3*s], atoi(star_match[7]), TRUE);
            looking_at(buf, &i, "*% "); // eat prompt
            if(oldi > 0 && buf[oldi-1] == '\n') oldi--; // suppress preceding LF, if any
            if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = i; // suppress
            continue;
          }
          if(looking_at(buf, &i, "\nAds removed: *\n") || looking_at(buf, &i, "\031(51 * *\031)")) {
            char *p = star_match[0];
            while(*p) {
              if(seekGraphUp) RemoveSeekAd(atoi(p));
              while(*p && *p++ != ' '); // next
            }
            looking_at(buf, &i, "*% "); // eat prompt
            if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = i;
            continue;
          }
        }
      }

      /* skip formula vars */
      if (started == STARTED_NONE &&
          buf[i] == 'f' && isdigit(buf[i+1]) && buf[i+2] == ':') {
        started = STARTED_CHATTER;
        i += 3;
        continue;
      }

      // [HGM] kibitz: try to recognize opponent engine-score kibitzes, to divert them to engine-output window
      if (appData.autoKibitz && started == STARTED_NONE &&
          !appData.icsEngineAnalyze &&                     // [HGM] [DM] ICS analyze
          (gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack || gameMode == IcsObserving)) {
        if((looking_at(buf, &i, "\n* kibitzes: ") || looking_at(buf, &i, "\n* whispers: ") ||
              looking_at(buf, &i, "* kibitzes: ") || looking_at(buf, &i, "* whispers: ")) &&
            (StrStr(star_match[0], gameInfo.white) == star_match[0] ||
             StrStr(star_match[0], gameInfo.black) == star_match[0]   )) { // kibitz of self or opponent
          suppressKibitz = TRUE;
          if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
          next_out = i;
          if((StrStr(star_match[0], gameInfo.white) == star_match[0]
                && (gameMode == IcsPlayingWhite)) ||
              (StrStr(star_match[0], gameInfo.black) == star_match[0]
               && (gameMode == IcsPlayingBlack))   ) // opponent kibitz
            started = STARTED_CHATTER; // own kibitz we simply discard
          else {
            started = STARTED_COMMENT; // make sure it will be collected in parse[]
            parse_pos = 0; parse[0] = NULLCHAR;
            savingComment = TRUE;
            suppressKibitz = gameMode != IcsObserving ? 2 :
              (StrStr(star_match[0], gameInfo.white) == NULL) + 1;
          }
          continue;
        } else
          if((looking_at(buf, &i, "\nkibitzed to *\n") || looking_at(buf, &i, "kibitzed to *\n") ||
                looking_at(buf, &i, "\n(kibitzed to *\n") || looking_at(buf, &i, "(kibitzed to *\n"))
              && atoi(star_match[0])) {
            // suppress the acknowledgements of our own autoKibitz
            char *p;
            if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
            if(p = strchr(star_match[0], ' ')) p[1] = NULLCHAR; // clip off "players)" on FICS
            SendToPlayer(star_match[0], strlen(star_match[0]));
            if(looking_at(buf, &i, "*% ")) // eat prompt
              suppressKibitz = FALSE;
            next_out = i;
            continue;
          }
      } // [HGM] kibitz: end of patch

      if(looking_at(buf, &i, "* rating adjustment: * --> *\n")) continue;

      // [HGM] chat: intercept tells by users for which we have an open chat window
      channel = -1;
      if(started == STARTED_NONE && (looking_at(buf, &i, "* tells you:") || looking_at(buf, &i, "* says:") ||
            looking_at(buf, &i, "* whispers:") ||
            looking_at(buf, &i, "* kibitzes:") ||
            looking_at(buf, &i, "* shouts:") ||
            looking_at(buf, &i, "* c-shouts:") ||
            looking_at(buf, &i, "--> * ") ||
            looking_at(buf, &i, "*(*):") && (sscanf(star_match[1], "%d", &channel),1) ||
            looking_at(buf, &i, "*(*)(*):") && (sscanf(star_match[2], "%d", &channel),1) ||
            looking_at(buf, &i, "*(*)(*)(*):") && (sscanf(star_match[3], "%d", &channel),1) ||
            looking_at(buf, &i, "*(*)(*)(*)(*):") && sscanf(star_match[4], "%d", &channel) == 1 )) {
        int p;
        sscanf(star_match[0], "%[^(]", talker+1); // strip (C) or (U) off ICS handle
        chattingPartner = -1; collective = 0;

        if(channel >= 0) // channel broadcast; look if there is a chatbox for this channel
          for(p=0; p<MAX_CHAT; p++) {
            collective = 1;
            if(chatPartner[p][0] >= '0' && chatPartner[p][0] <= '9' && channel == atoi(chatPartner[p])) {
              talker[0] = '['; strcat(talker, "] ");
              Colorize((channel == 1 ? ColorChannel1 : ColorChannel), FALSE);
              chattingPartner = p; break;
            }
          } else
            if(buf[i-3] == 'e') // kibitz; look if there is a KIBITZ chatbox
              for(p=0; p<MAX_CHAT; p++) {
                collective = 1;
                if(!strcmp("kibitzes", chatPartner[p])) {
                  talker[0] = '['; strcat(talker, "] ");
                  chattingPartner = p; break;
                }
              } else
                if(buf[i-3] == 'r') // whisper; look if there is a WHISPER chatbox
                  for(p=0; p<MAX_CHAT; p++) {
                    collective = 1;
                    if(!strcmp("whispers", chatPartner[p])) {
                      talker[0] = '['; strcat(talker, "] ");
                      chattingPartner = p; break;
                    }
                  } else
                    if(buf[i-3] == 't' || buf[oldi+2] == '>') {// shout, c-shout or it; look if there is a 'shouts' chatbox
                      if(buf[i-8] == '-' && buf[i-3] == 't')
                        for(p=0; p<MAX_CHAT; p++) { // c-shout; check if dedicatesd c-shout box exists
                          collective = 1;
                          if(!strcmp("c-shouts", chatPartner[p])) {
                            talker[0] = '('; strcat(talker, ") "); Colorize(ColorSShout, FALSE);
                            chattingPartner = p; break;
                          }
                        }
                      if(chattingPartner < 0)
                        for(p=0; p<MAX_CHAT; p++) {
                          collective = 1;
                          if(!strcmp("shouts", chatPartner[p])) {
                            if(buf[oldi+2] == '>') { talker[0] = '<'; strcat(talker, "> "); Colorize(ColorShout, FALSE); }
                            else if(buf[i-8] == '-') { talker[0] = '('; strcat(talker, ") "); Colorize(ColorSShout, FALSE); }
                            else { talker[0] = '['; strcat(talker, "] "); Colorize(ColorShout, FALSE); }
                            chattingPartner = p; break;
                          }
                        }
                    }
          if(chattingPartner<0) // if not, look if there is a chatbox for this indivdual
            for(p=0; p<MAX_CHAT; p++) if(!StrCaseCmp(talker+1, chatPartner[p])) {
              talker[0] = 0;
              Colorize(ColorTell, FALSE);
              if(collective) safeStrCpy(talker, "broadcasts: ", MSG_SIZ);
              collective |= 2;
              chattingPartner = p; break;
            }
          if(chattingPartner<0) i = oldi, safeStrCpy(lastTalker, talker+1, MSG_SIZ); else {
            Colorize(curColor, TRUE); // undo the bogus colorations we just made to trigger the souds
            started = STARTED_COMMENT;
            parse_pos = 0; parse[0] = NULLCHAR;
            savingComment = 3 + chattingPartner; // counts as TRUE
            if(collective == 3) i = oldi; else {
              suppressKibitz = TRUE;
              if(oldi > 0 && buf[oldi-1] == '\n') oldi--;
              if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
              continue;
            }
          }
      } // [HGM] chat: end of patch

      backup = i;
      if (appData.zippyTalk || appData.zippyPlay) {
        /* [DM] Backup address for color zippy lines */
#if ZIPPY
        if (loggedOn == TRUE)
          if (ZippyControl(buf, &backup) || ZippyConverse(buf, &backup) ||
              (appData.zippyPlay && ZippyMatch(buf, &backup)))
            ;
#endif
      } // [DM] 'else' deleted
      if (
          /* Regular tells and says */
          (tkind = 1, looking_at(buf, &i, "* tells you: ")) ||
          looking_at(buf, &i, "* (your partner) tells you: ") ||
          looking_at(buf, &i, "* says: ") ||
          /* Don't color "message" or "messages" output */
          (tkind = 5, looking_at(buf, &i, "*. * (*:*): ")) ||
          looking_at(buf, &i, "*. * at *:*: ") ||
          looking_at(buf, &i, "--* (*:*): ") ||
          /* Message notifications (same color as tells) */
          looking_at(buf, &i, "* has left a message ") ||
          looking_at(buf, &i, "* just sent you a message:\n") ||
          /* Whispers and kibitzes */
          (tkind = 2, looking_at(buf, &i, "* whispers: ")) ||
          looking_at(buf, &i, "* kibitzes: ") ||
          /* Channel tells */
          (tkind = 3, looking_at(buf, &i, "*(*: "))) {

        if (tkind == 1 && strchr(star_match[0], ':')) {
          /* Avoid "tells you:" spoofs in channels */
          tkind = 3;
        }
        if (star_match[0][0] == NULLCHAR ||
            strchr(star_match[0], ' ') ||
            (tkind == 3 && strchr(star_match[1], ' '))) {
          /* Reject bogus matches */
          i = oldi;
        } else {
          if (appData.colorize) {
            if (oldi > next_out) {
              SendToPlayer(&buf[next_out], oldi - next_out);
              next_out = oldi;
            }
            switch (tkind) {
              case 1:
                Colorize(ColorTell, FALSE);
                curColor = ColorTell;
                break;
              case 2:
                Colorize(ColorKibitz, FALSE);
                curColor = ColorKibitz;
                break;
              case 3:
                p = strrchr(star_match[1], '(');
                if (p == NULL) {
                  p = star_match[1];
                } else {
                  p++;
                }
                if (atoi(p) == 1) {
                  Colorize(ColorChannel1, FALSE);
                  curColor = ColorChannel1;
                } else {
                  Colorize(ColorChannel, FALSE);
                  curColor = ColorChannel;
                }
                break;
              case 5:
                curColor = ColorNormal;
                break;
            }
          }
          if (started == STARTED_NONE && appData.autoComment &&
              (gameMode == IcsObserving ||
               gameMode == IcsPlayingWhite ||
               gameMode == IcsPlayingBlack)) {
            parse_pos = i - oldi;
            memcpy(parse, &buf[oldi], parse_pos);
            parse[parse_pos] = NULLCHAR;
            started = STARTED_COMMENT;
            savingComment = TRUE;
          } else if(collective != 3) {
            started = STARTED_CHATTER;
            savingComment = FALSE;
          }
          loggedOn = TRUE;
          continue;
        }
      }

      if (looking_at(buf, &i, "* s-shouts: ") ||
          looking_at(buf, &i, "* c-shouts: ")) {
        if (appData.colorize) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorSShout, FALSE);
          curColor = ColorSShout;
        }
        loggedOn = TRUE;
        started = STARTED_CHATTER;
        continue;
      }

      if (looking_at(buf, &i, "--->")) {
        loggedOn = TRUE;
        continue;
      }

      if (looking_at(buf, &i, "* shouts: ") ||
          looking_at(buf, &i, "--> ")) {
        if (appData.colorize) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorShout, FALSE);
          curColor = ColorShout;
        }
        loggedOn = TRUE;
        started = STARTED_CHATTER;
        continue;
      }

      if (looking_at( buf, &i, "Challenge:")) {
        if (appData.colorize) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorChallenge, FALSE);
          curColor = ColorChallenge;
        }
        loggedOn = TRUE;
        continue;
      }

      if (looking_at(buf, &i, "* offers you") ||
          looking_at(buf, &i, "* offers to be") ||
          looking_at(buf, &i, "* would like to") ||
          looking_at(buf, &i, "* requests to") ||
          looking_at(buf, &i, "Your opponent offers") ||
          looking_at(buf, &i, "Your opponent requests")) {

        if (appData.colorize) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorRequest, FALSE);
          curColor = ColorRequest;
        }
        continue;
      }

      if (looking_at(buf, &i, "* (*) seeking")) {
        if (appData.colorize) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorSeek, FALSE);
          curColor = ColorSeek;
        }
        continue;
      }

      if(i < backup) { i = backup; continue; } // [HGM] for if ZippyControl matches, but the colorie code doesn't

      if (looking_at(buf, &i, "\\   ")) {
        if (prevColor != ColorNormal) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(prevColor, TRUE);
          curColor = prevColor;
        }
        if (savingComment) {
          parse_pos = i - oldi;
          memcpy(parse, &buf[oldi], parse_pos);
          parse[parse_pos] = NULLCHAR;
          started = STARTED_COMMENT;
          if(savingComment >= 3) // [HGM] chat: continuation of line for chat box
            chattingPartner = savingComment - 3; // kludge to remember the box
        } else {
          started = STARTED_CHATTER;
        }
        continue;
      }

      if (looking_at(buf, &i, "Black Strength :") ||
          looking_at(buf, &i, "<<< style 10 board >>>") ||
          looking_at(buf, &i, "<10>") ||
          looking_at(buf, &i, "#@#")) {
        /* Wrong board style */
        loggedOn = TRUE;
        SendToICS(ics_prefix);
        SendToICS("set style 12\n");
        SendToICS(ics_prefix);
        SendToICS("refresh\n");
        continue;
      }

      if (looking_at(buf, &i, "login:")) {
        if (!have_sent_ICS_logon) {
          if(ICSInitScript())
            have_sent_ICS_logon = 1;
          else // no init script was found
            have_sent_ICS_logon = (appData.autoCreateLogon ? 2 : 1); // flag that we should capture username + password
        } else { // we have sent (or created) the InitScript, but apparently the ICS rejected it
          have_sent_ICS_logon = (appData.autoCreateLogon ? 2 : 1); // request creation of a new script
        }
        continue;
      }

      if (ics_getting_history != H_GETTING_MOVES /*smpos kludge*/ &&
          (looking_at(buf, &i, "\n<12> ") ||
           looking_at(buf, &i, "<12> "))) {
        loggedOn = TRUE;
        if (oldi > next_out) {
          SendToPlayer(&buf[next_out], oldi - next_out);
        }
        next_out = i;
        started = STARTED_BOARD;
        parse_pos = 0;
        continue;
      }

      if ((started == STARTED_NONE && looking_at(buf, &i, "\n<b1> ")) ||
          looking_at(buf, &i, "<b1> ")) {
        if (oldi > next_out) {
          SendToPlayer(&buf[next_out], oldi - next_out);
        }
        next_out = i;
        started = STARTED_HOLDINGS;
        parse_pos = 0;
        continue;
      }

      if (looking_at(buf, &i, "* *vs. * *--- *")) {
        loggedOn = TRUE;
        /* Header for a move list -- first line */

        switch (ics_getting_history) {
          case H_FALSE:
            switch (gameMode) {
              case IcsIdle:
              case BeginningOfGame:
                /* User typed "moves" or "oldmoves" while we
                   were idle.  Pretend we asked for these
                   moves and soak them up so user can step
                   through them and/or save them.
                   */
                Reset(FALSE, TRUE);
                gameMode = IcsObserving;
                ModeHighlight();
                ics_gamenum = -1;
                ics_getting_history = H_GOT_UNREQ_HEADER;
                break;
              case EditGame: /*?*/
              case EditPosition: /*?*/
                /* Should above feature work in these modes too? */
                /* For now it doesn't */
                ics_getting_history = H_GOT_UNWANTED_HEADER;
                break;
              default:
                ics_getting_history = H_GOT_UNWANTED_HEADER;
                break;
            }
            break;
          case H_REQUESTED:
            /* Is this the right one? */
            if (gameInfo.white && gameInfo.black &&
                strcmp(gameInfo.white, star_match[0]) == 0 &&
                strcmp(gameInfo.black, star_match[2]) == 0) {
              /* All is well */
              ics_getting_history = H_GOT_REQ_HEADER;
            }
            break;
          case H_GOT_REQ_HEADER:
          case H_GOT_UNREQ_HEADER:
          case H_GOT_UNWANTED_HEADER:
          case H_GETTING_MOVES:
            /* Should not happen */
            DisplayError(_("Error gathering move list: two headers"), 0);
            ics_getting_history = H_FALSE;
            break;
        }

        /* Save player ratings into gameInfo if needed */
        if ((ics_getting_history == H_GOT_REQ_HEADER ||
              ics_getting_history == H_GOT_UNREQ_HEADER) &&
            (gameInfo.whiteRating == -1 ||
             gameInfo.blackRating == -1)) {

          gameInfo.whiteRating = string_to_rating(star_match[1]);
          gameInfo.blackRating = string_to_rating(star_match[3]);
          if (appData.debugMode)
            fprintf(debugFP, "Ratings from header: W %d, B %d\n",
                gameInfo.whiteRating, gameInfo.blackRating);
        }
        continue;
      }

      if (looking_at(buf, &i,
            "* * match, initial time: * minute*, increment: * second")) {
        /* Header for a move list -- second line */
        /* Initial board will follow if this is a wild game */
        if (gameInfo.event != NULL) free(gameInfo.event);
        snprintf(str, MSG_SIZ, "ICS %s %s match", star_match[0], star_match[1]);
        gameInfo.event = StrSave(str);
        /* [HGM] we switched variant. Translate boards if needed. */
        VariantSwitch(boards[currentMove], StringToVariant(gameInfo.event));
        continue;
      }

      if (looking_at(buf, &i, "Move  ")) {
        /* Beginning of a move list */
        switch (ics_getting_history) {
          case H_FALSE:
            /* Normally should not happen */
            /* Maybe user hit reset while we were parsing */
            break;
          case H_REQUESTED:
            /* Happens if we are ignoring a move list that is not
             * the one we just requested.  Common if the user
             * tries to observe two games without turning off
             * getMoveList */
            break;
          case H_GETTING_MOVES:
            /* Should not happen */
            DisplayError(_("Error gathering move list: nested"), 0);
            ics_getting_history = H_FALSE;
            break;
          case H_GOT_REQ_HEADER:
            ics_getting_history = H_GETTING_MOVES;
            started = STARTED_MOVES;
            parse_pos = 0;
            if (oldi > next_out) {
              SendToPlayer(&buf[next_out], oldi - next_out);
            }
            break;
          case H_GOT_UNREQ_HEADER:
            ics_getting_history = H_GETTING_MOVES;
            started = STARTED_MOVES_NOHIDE;
            parse_pos = 0;
            break;
          case H_GOT_UNWANTED_HEADER:
            ics_getting_history = H_FALSE;
            break;
        }
        continue;
      }

      if (looking_at(buf, &i, "% ") ||
          ((started == STARTED_MOVES || started == STARTED_MOVES_NOHIDE)
           && looking_at(buf, &i, "}*"))) { char *bookHit = NULL; // [HGM] book
        if(soughtPending && nrOfSeekAds) { // [HGM] seekgraph: on ICC sought-list has no termination line
          soughtPending = FALSE;
          seekGraphUp = TRUE;
          DrawSeekGraph();
        }
        if(suppressKibitz) next_out = i;
        savingComment = FALSE;
        suppressKibitz = 0;
        switch (started) {
          case STARTED_MOVES:
          case STARTED_MOVES_NOHIDE:
            memcpy(&parse[parse_pos], &buf[oldi], i - oldi);
            parse[parse_pos + i - oldi] = NULLCHAR;
            ParseGameHistory(parse);
#if ZIPPY
            if (appData.zippyPlay && first.initDone) {
              FeedMovesToProgram(&first, forwardMostMove);
              if (gameMode == IcsPlayingWhite) {
                if (WhiteOnMove(forwardMostMove)) {
                  if (first.sendTime) {
                    if (first.useColors) {
                      SendToProgram("black\n", &first);
                    }
                    SendTimeRemaining(&first, TRUE);
                  }
                  if (first.useColors) {
                    SendToProgram("white\n", &first); // [HGM] book: made sending of "go\n" book dependent
                  }
                  bookHit = SendMoveToBookUser(forwardMostMove-1, &first, TRUE); // [HGM] book: probe book for initial pos
                  first.maybeThinking = TRUE;
                } else {
                  if (first.usePlayother) {
                    if (first.sendTime) {
                      SendTimeRemaining(&first, TRUE);
                    }
                    SendToProgram("playother\n", &first);
                    firstMove = FALSE;
                  } else {
                    firstMove = TRUE;
                  }
                }
              } else if (gameMode == IcsPlayingBlack) {
                if (!WhiteOnMove(forwardMostMove)) {
                  if (first.sendTime) {
                    if (first.useColors) {
                      SendToProgram("white\n", &first);
                    }
                    SendTimeRemaining(&first, FALSE);
                  }
                  if (first.useColors) {
                    SendToProgram("black\n", &first);
                  }
                  bookHit = SendMoveToBookUser(forwardMostMove-1, &first, TRUE);
                  first.maybeThinking = TRUE;
                } else {
                  if (first.usePlayother) {
                    if (first.sendTime) {
                      SendTimeRemaining(&first, FALSE);
                    }
                    SendToProgram("playother\n", &first);
                    firstMove = FALSE;
                  } else {
                    firstMove = TRUE;
                  }
                }
              }
            }
#endif
            if (gameMode == IcsObserving && ics_gamenum == -1) {
              /* Moves came from oldmoves or moves command
                 while we weren't doing anything else.
                 */
              currentMove = forwardMostMove;
              ClearHighlights();/*!!could figure this out*/
              flipView = appData.flipView;
              DrawPosition(TRUE, boards[currentMove]);
              DisplayBothClocks();
              snprintf(str, MSG_SIZ, "%s %s %s",
                  gameInfo.white, _("vs."),  gameInfo.black);
              DisplayTitle(str);
              gameMode = IcsIdle;
            } else {
              /* Moves were history of an active game */
              if (gameInfo.resultDetails != NULL) {
                free(gameInfo.resultDetails);
                gameInfo.resultDetails = NULL;
              }
            }
            HistorySet(parseList, backwardMostMove,
                forwardMostMove, currentMove-1);
            DisplayMove(currentMove - 1);
            if (started == STARTED_MOVES) next_out = i;
            started = STARTED_NONE;
            ics_getting_history = H_FALSE;
            break;

          case STARTED_OBSERVE:
            started = STARTED_NONE;
            SendToICS(ics_prefix);
            SendToICS("refresh\n");
            break;

          default:
            break;
        }
        if(bookHit) { // [HGM] book: simulate book reply
          static char bookMove[MSG_SIZ]; // a bit generous?

          programStats.nodes = programStats.depth = programStats.time =
            programStats.score = programStats.got_only_move = 0;
          sprintf(programStats.movelist, "%s (xbook)", bookHit);

          safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
          strcat(bookMove, bookHit);
          HandleMachineMove(bookMove, &first);
        }
        continue;
      }

      if ((started == STARTED_MOVES || started == STARTED_BOARD ||
            started == STARTED_HOLDINGS ||
            started == STARTED_MOVES_NOHIDE) && i >= leftover_len) {
        /* Accumulate characters in move list or board */
        parse[parse_pos++] = buf[i];
      }

      /* Start of game messages.  Mostly we detect start of game
         when the first board image arrives.  On some versions
         of the ICS, though, we need to do a "refresh" after starting
         to observe in order to get the current board right away. */
      if (looking_at(buf, &i, "Adding game * to observation list")) {
        started = STARTED_OBSERVE;
        continue;
      }

      /* Handle auto-observe */
      if (appData.autoObserve &&
          (gameMode == IcsIdle || gameMode == BeginningOfGame) &&
          looking_at(buf, &i, "Game notification: * (*) vs. * (*)")) {
        char *player;
        /* Choose the player that was highlighted, if any. */
        if (star_match[0][0] == '\033' ||
            star_match[1][0] != '\033') {
          player = star_match[0];
        } else {
          player = star_match[2];
        }
        snprintf(str, MSG_SIZ, "%sobserve %s\n",
            ics_prefix, StripHighlightAndTitle(player));
        SendToICS(str);

        /* Save ratings from notify string */
        safeStrCpy(player1Name, star_match[0], sizeof(player1Name)/sizeof(player1Name[0]));
        player1Rating = string_to_rating(star_match[1]);
        safeStrCpy(player2Name, star_match[2], sizeof(player2Name)/sizeof(player2Name[0]));
        player2Rating = string_to_rating(star_match[3]);

        if (appData.debugMode)
          fprintf(debugFP,
              "Ratings from 'Game notification:' %s %d, %s %d\n",
              player1Name, player1Rating,
              player2Name, player2Rating);

        continue;
      }

      /* Deal with automatic examine mode after a game,
         and with IcsObserving -> IcsExamining transition */
      if (looking_at(buf, &i, "Entering examine mode for game *") ||
          looking_at(buf, &i, "has made you an examiner of game *")) {

        int gamenum = atoi(star_match[0]);
        if ((gameMode == IcsIdle || gameMode == IcsObserving) &&
            gamenum == ics_gamenum) {
          /* We were already playing or observing this game;
             no need to refetch history */
          gameMode = IcsExamining;
          if (pausing) {
            pauseExamForwardMostMove = forwardMostMove;
          } else if (currentMove < forwardMostMove) {
            ForwardInner(forwardMostMove);
          }
        } else {
          /* I don't think this case really can happen */
          SendToICS(ics_prefix);
          SendToICS("refresh\n");
        }
        continue;
      }

      /* Error messages */
      //	    if (ics_user_moved)
      if (1) { // [HGM] old way ignored error after move type in; ics_user_moved is not set then!
        if (looking_at(buf, &i, "Illegal move") ||
            looking_at(buf, &i, "Not a legal move") ||
            looking_at(buf, &i, "Your king is in check") ||
            looking_at(buf, &i, "It isn't your turn") ||
            looking_at(buf, &i, "It is not your move")) {
          /* Illegal move */
          if (ics_user_moved && forwardMostMove > backwardMostMove) { // only backup if we already moved
            currentMove = forwardMostMove-1;
            DisplayMove(currentMove - 1); /* before DMError */
            DrawPosition(FALSE, boards[currentMove]);
            SwitchClocks(forwardMostMove-1); // [HGM] race
            DisplayBothClocks();
          }
          DisplayMoveError(_("Illegal move (rejected by ICS)")); // [HGM] but always relay error msg
          ics_user_moved = 0;
          continue;
        }
      }

      if (looking_at(buf, &i, "still have time") ||
          looking_at(buf, &i, "not out of time") ||
          looking_at(buf, &i, "either player is out of time") ||
          looking_at(buf, &i, "has timeseal; checking")) {
        /* We must have called his flag a little too soon */
        whiteFlag = blackFlag = FALSE;
        continue;
      }

      if (looking_at(buf, &i, "added * seconds to") ||
          looking_at(buf, &i, "seconds were added to")) {
        /* Update the clocks */
        SendToICS(ics_prefix);
        SendToICS("refresh\n");
        continue;
      }

      if (!ics_clock_paused && looking_at(buf, &i, "clock paused")) {
        ics_clock_paused = TRUE;
        StopClocks();
        continue;
      }

      if (ics_clock_paused && looking_at(buf, &i, "clock resumed")) {
        ics_clock_paused = FALSE;
        StartClocks();
        continue;
      }

      /* Grab player ratings from the Creating: message.
         Note we have to check for the special case when
         the ICS inserts things like [white] or [black]. */
      if (looking_at(buf, &i, "Creating: * (*)* * (*)") ||
          looking_at(buf, &i, "Creating: * (*) [*] * (*)")) {
        /* star_matches:
           0    player 1 name (not necessarily white)
           1	player 1 rating
           2	empty, white, or black (IGNORED)
           3	player 2 name (not necessarily black)
           4    player 2 rating

           The names/ratings are sorted out when the game
           actually starts (below).
           */
        safeStrCpy(player1Name, StripHighlightAndTitle(star_match[0]), sizeof(player1Name)/sizeof(player1Name[0]));
        player1Rating = string_to_rating(star_match[1]);
        safeStrCpy(player2Name, StripHighlightAndTitle(star_match[3]), sizeof(player2Name)/sizeof(player2Name[0]));
        player2Rating = string_to_rating(star_match[4]);

        if (appData.debugMode)
          fprintf(debugFP,
              "Ratings from 'Creating:' %s %d, %s %d\n",
              player1Name, player1Rating,
              player2Name, player2Rating);

        continue;
      }

      /* Improved generic start/end-of-game messages */
      if ((tkind=0, looking_at(buf, &i, "{Game * (* vs. *) *}*")) ||
          (tkind=1, looking_at(buf, &i, "{Game * (*(*) vs. *(*)) *}*"))){
        /* If tkind == 0: */
        /* star_match[0] is the game number */
        /*           [1] is the white player's name */
        /*           [2] is the black player's name */
        /* For end-of-game: */
        /*           [3] is the reason for the game end */
        /*           [4] is a PGN end game-token, preceded by " " */
        /* For start-of-game: */
        /*           [3] begins with "Creating" or "Continuing" */
        /*           [4] is " *" or empty (don't care). */
        int gamenum = atoi(star_match[0]);
        char *whitename, *blackname, *why, *endtoken;
        ChessMove endtype = EndOfFile;

        if (tkind == 0) {
          whitename = star_match[1];
          blackname = star_match[2];
          why = star_match[3];
          endtoken = star_match[4];
        } else {
          whitename = star_match[1];
          blackname = star_match[3];
          why = star_match[5];
          endtoken = star_match[6];
        }

        /* Game start messages */
        if (strncmp(why, "Creating ", 9) == 0 ||
            strncmp(why, "Continuing ", 11) == 0) {
          gs_gamenum = gamenum;
          safeStrCpy(gs_kind, strchr(why, ' ') + 1,sizeof(gs_kind)/sizeof(gs_kind[0]));
          if(ics_gamenum == -1) // [HGM] only if we are not already involved in a game (because gin=1 sends us such messages)
            VariantSwitch(boards[currentMove], StringToVariant(gs_kind)); // [HGM] variantswitch: even before we get first board
#if ZIPPY
          if (appData.zippyPlay) {
            ZippyGameStart(whitename, blackname);
          }
#endif /*ZIPPY*/
          partnerBoardValid = FALSE; // [HGM] bughouse
          continue;
        }

        /* Game end messages */
        if (gameMode == IcsIdle || gameMode == BeginningOfGame ||
            ics_gamenum != gamenum) {
          continue;
        }
        while (endtoken[0] == ' ') endtoken++;
        switch (endtoken[0]) {
          case '*':
          default:
            endtype = GameUnfinished;
            break;
          case '0':
            endtype = BlackWins;
            break;
          case '1':
            if (endtoken[1] == '/')
              endtype = GameIsDrawn;
            else
              endtype = WhiteWins;
            break;
        }
        GameEnds(endtype, why, GE_ICS);
#if ZIPPY
        if (appData.zippyPlay && first.initDone) {
          ZippyGameEnd(endtype, why);
          if (first.pr == NoProc) {
            /* Start the next process early so that we'll
               be ready for the next challenge */
            StartChessProgram(&first);
          }
          /* Send "new" early, in case this command takes
             a long time to finish, so that we'll be ready
             for the next challenge. */
          gameInfo.variant = VariantNormal; // [HGM] variantswitch: suppress sending of 'variant'
          Reset(TRUE, TRUE);
        }
#endif /*ZIPPY*/
        if(appData.bgObserve && partnerBoardValid) DrawPosition(TRUE, partnerBoard);
        continue;
      }

      if (looking_at(buf, &i, "Removing game * from observation") ||
          looking_at(buf, &i, "no longer observing game *") ||
          looking_at(buf, &i, "Game * (*) has no examiners")) {
        if (gameMode == IcsObserving &&
            atoi(star_match[0]) == ics_gamenum)
        {
          /* icsEngineAnalyze */
          if (appData.icsEngineAnalyze) {
            ExitAnalyzeMode();
            ModeHighlight();
          }
          StopClocks();
          gameMode = IcsIdle;
          ics_gamenum = -1;
          ics_user_moved = FALSE;
        }
        continue;
      }

      if (looking_at(buf, &i, "no longer examining game *")) {
        if (gameMode == IcsExamining &&
            atoi(star_match[0]) == ics_gamenum)
        {
          gameMode = IcsIdle;
          ics_gamenum = -1;
          ics_user_moved = FALSE;
        }
        continue;
      }

      /* Advance leftover_start past any newlines we find,
         so only partial lines can get reparsed */
      if (looking_at(buf, &i, "\n")) {
        prevColor = curColor;
        if (curColor != ColorNormal) {
          if (oldi > next_out) {
            SendToPlayer(&buf[next_out], oldi - next_out);
            next_out = oldi;
          }
          Colorize(ColorNormal, FALSE);
          curColor = ColorNormal;
        }
        if (started == STARTED_BOARD) {
          started = STARTED_NONE;
          parse[parse_pos] = NULLCHAR;
          ParseBoard12(parse);
          ics_user_moved = 0;

          /* Send premove here */
          if (appData.premove) {
            char str[MSG_SIZ];
            if (currentMove == 0 &&
                gameMode == IcsPlayingWhite &&
                appData.premoveWhite) {
              snprintf(str, MSG_SIZ, "%s\n", appData.premoveWhiteText);
              if (appData.debugMode)
                fprintf(debugFP, "Sending premove:\n");
              SendToICS(str);
            } else if (currentMove == 1 &&
                gameMode == IcsPlayingBlack &&
                appData.premoveBlack) {
              snprintf(str, MSG_SIZ, "%s\n", appData.premoveBlackText);
              if (appData.debugMode)
                fprintf(debugFP, "Sending premove:\n");
              SendToICS(str);
            } else if (gotPremove) {
              int oldFMM = forwardMostMove;
              gotPremove = 0;
              ClearPremoveHighlights();
              if (appData.debugMode)
                fprintf(debugFP, "Sending premove:\n");
              UserMoveEvent(premoveFromX, premoveFromY,
                  premoveToX, premoveToY,
                  premovePromoChar);
              if(forwardMostMove == oldFMM) { // premove was rejected, highlight last opponent move
                if(moveList[oldFMM-1][1] != '@')
                  SetHighlights(moveList[oldFMM-1][0]-AAA, moveList[oldFMM-1][1]-ONE,
                      moveList[oldFMM-1][2]-AAA, moveList[oldFMM-1][3]-ONE);
                else // (drop)
                  SetHighlights(-1, -1, moveList[oldFMM-1][2]-AAA, moveList[oldFMM-1][3]-ONE);
              }
            }
          }

          /* Usually suppress following prompt */
          if (!(forwardMostMove == 0 && gameMode == IcsExamining)) {
            while(looking_at(buf, &i, "\n")); // [HGM] skip empty lines
            if (looking_at(buf, &i, "*% ")) {
              savingComment = FALSE;
              suppressKibitz = 0;
            }
          }
          next_out = i;
        } else if (started == STARTED_HOLDINGS) {
          int gamenum;
          char new_piece[MSG_SIZ];
          started = STARTED_NONE;
          parse[parse_pos] = NULLCHAR;
          if (appData.debugMode)
            fprintf(debugFP, "Parsing holdings: %s, currentMove = %d\n",
                parse, currentMove);
          if (sscanf(parse, " game %d", &gamenum) == 1) {
            if(gamenum == ics_gamenum) { // [HGM] bughouse: old code if part of foreground game
              if (gameInfo.variant == VariantNormal) {
                /* [HGM] We seem to switch variant during a game!
                 * Presumably no holdings were displayed, so we have
                 * to move the position two files to the right to
                 * create room for them!
                 */
                VariantClass newVariant;
                switch(gameInfo.boardWidth) { // base guess on board width
                  case 9:  newVariant = VariantShogi; break;
                  case 10: newVariant = VariantGreat; break;
                  default: newVariant = VariantCrazyhouse; break;
                }
                VariantSwitch(boards[currentMove], newVariant); /* temp guess */
                /* Get a move list just to see the header, which
                   will tell us whether this is really bug or zh */
                if (ics_getting_history == H_FALSE) {
                  ics_getting_history = H_REQUESTED;
                  snprintf(str, MSG_SIZ, "%smoves %d\n", ics_prefix, gamenum);
                  SendToICS(str);
                }
              }
              new_piece[0] = NULLCHAR;
              sscanf(parse, "game %d white [%s black [%s <- %s",
                  &gamenum, white_holding, black_holding,
                  new_piece);
              white_holding[strlen(white_holding)-1] = NULLCHAR;
              black_holding[strlen(black_holding)-1] = NULLCHAR;
              /* [HGM] copy holdings to board holdings area */
              CopyHoldings(boards[forwardMostMove], white_holding, WhitePawn);
              CopyHoldings(boards[forwardMostMove], black_holding, BlackPawn);
              boards[forwardMostMove][HOLDINGS_SET] = 1; // flag holdings as set
#if ZIPPY
              if (appData.zippyPlay && first.initDone) {
                ZippyHoldings(white_holding, black_holding,
                    new_piece);
              }
#endif /*ZIPPY*/
              if (tinyLayout || smallLayout) {
                char wh[16], bh[16];
                PackHolding(wh, white_holding);
                PackHolding(bh, black_holding);
                snprintf(str, MSG_SIZ, "[%s-%s] %s-%s", wh, bh,
                    gameInfo.white, gameInfo.black);
              } else {
                snprintf(str, MSG_SIZ, "%s [%s] %s %s [%s]",
                    gameInfo.white, white_holding, _("vs."),
                    gameInfo.black, black_holding);
              }
              if(!partnerUp) // [HGM] bughouse: when peeking at partner game we already know what he captured...
                DrawPosition(FALSE, boards[currentMove]);
              DisplayTitle(str);
            } else if(appData.bgObserve) { // [HGM] bughouse: holdings of other game => background
              sscanf(parse, "game %d white [%s black [%s <- %s",
                  &gamenum, white_holding, black_holding,
                  new_piece);
              white_holding[strlen(white_holding)-1] = NULLCHAR;
              black_holding[strlen(black_holding)-1] = NULLCHAR;
              /* [HGM] copy holdings to partner-board holdings area */
              CopyHoldings(partnerBoard, white_holding, WhitePawn);
              CopyHoldings(partnerBoard, black_holding, BlackPawn);
              if(twoBoards) { partnerUp = 1; flipView = !flipView; } // [HGM] dual: always draw
              if(partnerUp) DrawPosition(FALSE, partnerBoard);
              if(twoBoards) { partnerUp = 0; flipView = !flipView; }
            }
          }
          /* Suppress following prompt */
          if (looking_at(buf, &i, "*% ")) {
            if(strchr(star_match[0], 7)) SendToPlayer("\007", 1); // Bell(); // FICS fuses bell for next board with prompt in zh captures
            savingComment = FALSE;
            suppressKibitz = 0;
          }
          next_out = i;
        }
        continue;
      }

      i++;		/* skip unparsed character and loop back */
    }

    if (started != STARTED_MOVES && started != STARTED_BOARD && !suppressKibitz && // [HGM] kibitz
        //	    started != STARTED_HOLDINGS && i > next_out) // [HGM] should we compare to leftover_start in stead of i?
        //	    SendToPlayer(&buf[next_out], i - next_out);
      started != STARTED_HOLDINGS && leftover_start > next_out) {
        SendToPlayer(&buf[next_out], leftover_start - next_out);
        next_out = i;
      }

    leftover_len = buf_len - leftover_start;
    /* if buffer ends with something we couldn't parse,
       reparse it after appending the next read */

  } else if (count == 0) {
    RemoveInputSource(isr);
    DisplayFatalError(_("Connection closed by ICS"), 0, 6666);
  } else {
    DisplayFatalError(_("Error reading from ICS"), error, 1);
  }
}


/* Board style 12 looks like this:

   <12> r-b---k- pp----pp ---bP--- ---p---- q------- ------P- P--Q--BP -----R-K W -1 0 0 0 0 0 0 paf MaxII 0 2 12 21 25 234 174 24 Q/d7-a4 (0:06) Qxa4 0 0

 * The "<12> " is stripped before it gets to this routine.  The two
 * trailing 0's (flip state and clock ticking) are later addition, and
 * some chess servers may not have them, or may have only the first.
 * Additional trailing fields may be added in the future.
 */

#define PATTERN "%c%d%d%d%d%d%d%d%s%s%d%d%d%d%d%d%d%d%s%s%s%d%d"

#define RELATION_OBSERVING_PLAYED    0
#define RELATION_OBSERVING_STATIC   -2   /* examined, oldmoves, or smoves */
#define RELATION_PLAYING_MYMOVE      1
#define RELATION_PLAYING_NOTMYMOVE  -1
#define RELATION_EXAMINING           2
#define RELATION_ISOLATED_BOARD     -3
#define RELATION_STARTING_POSITION  -4   /* FICS only */

void ParseBoard12 (char *string)
{
#if ZIPPY
  int i, takeback;
  char *bookHit = NULL; // [HGM] book
#endif
  GameMode newGameMode;
  int gamenum, newGame, newMove, relation, basetime, increment, ics_flip = 0;
  int j, k, n, moveNum, white_stren, black_stren, white_time, black_time;
  int double_push, castle_ws, castle_wl, castle_bs, castle_bl, irrev_count;
  char to_play, board_chars[200];
  char move_str[MSG_SIZ], str[MSG_SIZ], elapsed_time[MSG_SIZ];
  char black[32], white[32];
  Board board;
  int prevMove = currentMove;
  int ticking = 2;
  ChessMove moveType;
  int fromX, fromY, toX, toY;
  char promoChar;
  int ranks=1, files=0; /* [HGM] ICS80: allow variable board size */
  Boolean weird = FALSE, reqFlag = FALSE;

  fromX = fromY = toX = toY = -1;

  newGame = FALSE;

  if (appData.debugMode)
    fprintf(debugFP, "Parsing board: %s\n", string);

  move_str[0] = NULLCHAR;
  elapsed_time[0] = NULLCHAR;
  {   /* [HGM] figure out how many ranks and files the board has, for ICS extension used by Capablanca server */
    int  i = 0, j;
    while(i < 199 && (string[i] != ' ' || string[i+2] != ' ')) {
      if(string[i] == ' ') { ranks++; files = 0; }
      else files++;
      if(!strchr(" -pnbrqkPNBRQK" , string[i])) weird = TRUE; // test for fairies
      i++;
    }
    for(j = 0; j <i; j++) board_chars[j] = string[j];
    board_chars[i] = '\0';
    string += i + 1;
  }
  n = sscanf(string, PATTERN, &to_play, &double_push,
      &castle_ws, &castle_wl, &castle_bs, &castle_bl, &irrev_count,
      &gamenum, white, black, &relation, &basetime, &increment,
      &white_stren, &black_stren, &white_time, &black_time,
      &moveNum, str, elapsed_time, move_str, &ics_flip,
      &ticking);

  if (n < 21) {
    snprintf(str, MSG_SIZ, _("Failed to parse board string:\n\"%s\""), string);
    DisplayError(str, 0);
    return;
  }

  /* Convert the move number to internal form */
  moveNum = (moveNum - 1) * 2;
  if (to_play == 'B') moveNum++;
  if (moveNum > framePtr) { // [HGM] vari: do not run into saved variations
    DisplayFatalError(_("Game too long; increase MAX_MOVES and recompile"),
        0, 1);
    return;
  }

  switch (relation) {
    case RELATION_OBSERVING_PLAYED:
    case RELATION_OBSERVING_STATIC:
      if (gamenum == -1) {
        /* Old ICC buglet */
        relation = RELATION_OBSERVING_STATIC;
      }
      newGameMode = IcsObserving;
      break;
    case RELATION_PLAYING_MYMOVE:
    case RELATION_PLAYING_NOTMYMOVE:
      newGameMode =
        ((relation == RELATION_PLAYING_MYMOVE) == (to_play == 'W')) ?
        IcsPlayingWhite : IcsPlayingBlack;
      soughtPending =FALSE; // [HGM] seekgraph: solve race condition
      break;
    case RELATION_EXAMINING:
      newGameMode = IcsExamining;
      break;
    case RELATION_ISOLATED_BOARD:
    default:
      /* Just display this board.  If user was doing something else,
         we will forget about it until the next board comes. */
      newGameMode = IcsIdle;
      break;
    case RELATION_STARTING_POSITION:
      newGameMode = gameMode;
      break;
  }

  if((gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack ||
        gameMode == IcsObserving && appData.dualBoard) // also allow use of second board for observing two games
      && newGameMode == IcsObserving && gamenum != ics_gamenum && appData.bgObserve) {
    // [HGM] bughouse: don't act on alien boards while we play. Just parse the board and save it */
    int fac = strchr(elapsed_time, '.') ? 1 : 1000;
    static int lastBgGame = -1;
    char *toSqr;
    for (k = 0; k < ranks; k++) {
      for (j = 0; j < files; j++)
        board[k][j+gameInfo.holdingsWidth] = CharToPiece(board_chars[(ranks-1-k)*(files+1) + j]);
      if(gameInfo.holdingsWidth > 1) {
        board[k][0] = board[k][BOARD_WIDTH-1] = EmptySquare;
        board[k][1] = board[k][BOARD_WIDTH-2] = (ChessSquare) 0;;
      }
    }
    CopyBoard(partnerBoard, board);
    if(toSqr = strchr(str, '/')) { // extract highlights from long move
      partnerBoard[EP_STATUS-3] = toSqr[1] - AAA; // kludge: hide highlighting info in board
      partnerBoard[EP_STATUS-4] = toSqr[2] - ONE;
    } else partnerBoard[EP_STATUS-4] = partnerBoard[EP_STATUS-3] = -1;
    if(toSqr = strchr(str, '-')) {
      partnerBoard[EP_STATUS-1] = toSqr[1] - AAA;
      partnerBoard[EP_STATUS-2] = toSqr[2] - ONE;
    } else partnerBoard[EP_STATUS-1] = partnerBoard[EP_STATUS-2] = -1;
    if(appData.dualBoard && !twoBoards) { twoBoards = 1; InitDrawingSizes(-2,0); }
    if(twoBoards) { partnerUp = 1; flipView = !flipView; } // [HGM] dual
    if(partnerUp) DrawPosition(FALSE, partnerBoard);
    if(twoBoards) {
      DisplayWhiteClock(white_time*fac, to_play == 'W');
      DisplayBlackClock(black_time*fac, to_play != 'W');
      activePartner = to_play;
      if(gamenum != lastBgGame) {
        char buf[MSG_SIZ];
        snprintf(buf, MSG_SIZ, "%s %s %s", white, _("vs."), black);
        DisplayTitle(buf);
      }
      lastBgGame = gamenum;
      activePartnerTime = to_play == 'W' ? white_time*fac : black_time*fac;
      partnerUp = 0; flipView = !flipView; } // [HGM] dual
    snprintf(partnerStatus, MSG_SIZ,"W: %d:%02d B: %d:%02d (%d-%d) %c", white_time*fac/60000, (white_time*fac%60000)/1000,
        (black_time*fac/60000), (black_time*fac%60000)/1000, white_stren, black_stren, to_play);
    if(!twoBoards) DisplayMessage(partnerStatus, "");
    partnerBoardValid = TRUE;
    return;
  }

  if(appData.dualBoard && appData.bgObserve) {
    if((newGameMode == IcsPlayingWhite || newGameMode == IcsPlayingBlack) && moveNum == 1)
      SendToICS(ics_prefix), SendToICS("pobserve\n");
    else if(newGameMode == IcsObserving && (gameMode == BeginningOfGame || gameMode == IcsIdle)) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "%spobserve %s\n", ics_prefix, white);
      SendToICS(buf);
    }
  }

  /* Modify behavior for initial board display on move listing
     of wild games.
     */
  switch (ics_getting_history) {
    case H_FALSE:
    case H_REQUESTED:
      break;
    case H_GOT_REQ_HEADER:
    case H_GOT_UNREQ_HEADER:
      /* This is the initial position of the current game */
      gamenum = ics_gamenum;
      moveNum = 0;		/* old ICS bug workaround */
      if (to_play == 'B') {
        startedFromSetupPosition = TRUE;
        blackPlaysFirst = TRUE;
        moveNum = 1;
        if (forwardMostMove == 0) forwardMostMove = 1;
        if (backwardMostMove == 0) backwardMostMove = 1;
        if (currentMove == 0) currentMove = 1;
      }
      newGameMode = gameMode;
      relation = RELATION_STARTING_POSITION; /* ICC needs this */
      break;
    case H_GOT_UNWANTED_HEADER:
      /* This is an initial board that we don't want */
      return;
    case H_GETTING_MOVES:
      /* Should not happen */
      DisplayError(_("Error gathering move list: extra board"), 0);
      ics_getting_history = H_FALSE;
      return;
  }

  if (gameInfo.boardHeight != ranks || gameInfo.boardWidth != files ||
      move_str[1] == '@' && !gameInfo.holdingsWidth ||
      weird && (int)gameInfo.variant < (int)VariantShogi) {
    /* [HGM] We seem to have switched variant unexpectedly
     * Try to guess new variant from board size
     */
    VariantClass newVariant = VariantFairy; // if 8x8, but fairies present
    if(ranks == 8 && files == 10) newVariant = VariantCapablanca; else
      if(ranks == 10 && files == 9) newVariant = VariantXiangqi; else
        if(ranks == 8 && files == 12) newVariant = VariantCourier; else
          if(ranks == 9 && files == 9)  newVariant = VariantShogi; else
            if(ranks == 10 && files == 10) newVariant = VariantGrand; else
              if(!weird) newVariant = move_str[1] == '@' ? VariantCrazyhouse : VariantNormal;
    VariantSwitch(boards[currentMove], newVariant); /* temp guess */
    /* Get a move list just to see the header, which
       will tell us whether this is really bug or zh */
    if (ics_getting_history == H_FALSE) {
      ics_getting_history = H_REQUESTED; reqFlag = TRUE;
      snprintf(str, MSG_SIZ, "%smoves %d\n", ics_prefix, gamenum);
      SendToICS(str);
    }
  }

  /* Take action if this is the first board of a new game, or of a
     different game than is currently being displayed.  */
  if (gamenum != ics_gamenum || newGameMode != gameMode ||
      relation == RELATION_ISOLATED_BOARD) {

    /* Forget the old game and get the history (if any) of the new one */
    if (gameMode != BeginningOfGame) {
      Reset(TRUE, TRUE);
    }
    newGame = TRUE;
    if (appData.autoRaiseBoard) BoardToTop();
    prevMove = -3;
    if (gamenum == -1) {
      newGameMode = IcsIdle;
    } else if ((moveNum > 0 || newGameMode == IcsObserving) && newGameMode != IcsIdle &&
        appData.getMoveList && !reqFlag) {
      /* Need to get game history */
      ics_getting_history = H_REQUESTED;
      snprintf(str, MSG_SIZ, "%smoves %d\n", ics_prefix, gamenum);
      SendToICS(str);
    }

    /* Initially flip the board to have black on the bottom if playing
       black or if the ICS flip flag is set, but let the user change
       it with the Flip View button. */
    flipView = appData.autoFlipView ?
      (newGameMode == IcsPlayingBlack) || ics_flip :
      appData.flipView;

    /* Done with values from previous mode; copy in new ones */
    gameMode = newGameMode;
    ModeHighlight();
    ics_gamenum = gamenum;
    if (gamenum == gs_gamenum) {
      int klen = strlen(gs_kind);
      if (gs_kind[klen - 1] == '.') gs_kind[klen - 1] = NULLCHAR;
      snprintf(str, MSG_SIZ, "ICS %s", gs_kind);
      gameInfo.event = StrSave(str);
    } else {
      gameInfo.event = StrSave("ICS game");
    }
    gameInfo.site = StrSave(appData.icsHost);
    gameInfo.date = PGNDate();
    gameInfo.round = StrSave("-");
    gameInfo.white = StrSave(white);
    gameInfo.black = StrSave(black);
    timeControl = basetime * 60 * 1000;
    timeControl_2 = 0;
    timeIncrement = increment * 1000;
    movesPerSession = 0;
    gameInfo.timeControl = TimeControlTagValue();
    VariantSwitch(boards[currentMove], StringToVariant(gameInfo.event) );
    if (appData.debugMode) {
      fprintf(debugFP, "ParseBoard says variant = '%s'\n", gameInfo.event);
      fprintf(debugFP, "recognized as %s\n", VariantName(gameInfo.variant));
      setbuf(debugFP, NULL);
    }

    gameInfo.outOfBook = NULL;

    /* Do we have the ratings? */
    if (strcmp(player1Name, white) == 0 &&
        strcmp(player2Name, black) == 0) {
      if (appData.debugMode)
        fprintf(debugFP, "Remembered ratings: W %d, B %d\n",
            player1Rating, player2Rating);
      gameInfo.whiteRating = player1Rating;
      gameInfo.blackRating = player2Rating;
    } else if (strcmp(player2Name, white) == 0 &&
        strcmp(player1Name, black) == 0) {
      if (appData.debugMode)
        fprintf(debugFP, "Remembered ratings: W %d, B %d\n",
            player2Rating, player1Rating);
      gameInfo.whiteRating = player2Rating;
      gameInfo.blackRating = player1Rating;
    }
    player1Name[0] = player2Name[0] = NULLCHAR;

    /* Silence shouts if requested */
    if (appData.quietPlay &&
        (gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack)) {
      SendToICS(ics_prefix);
      SendToICS("set shout 0\n");
    }
  }

  /* Deal with midgame name changes */
  if (!newGame) {
    if (!gameInfo.white || strcmp(gameInfo.white, white) != 0) {
      if (gameInfo.white) free(gameInfo.white);
      gameInfo.white = StrSave(white);
    }
    if (!gameInfo.black || strcmp(gameInfo.black, black) != 0) {
      if (gameInfo.black) free(gameInfo.black);
      gameInfo.black = StrSave(black);
    }
  }

  /* Throw away game result if anything actually changes in examine mode */
  if (gameMode == IcsExamining && !newGame) {
    gameInfo.result = GameUnfinished;
    if (gameInfo.resultDetails != NULL) {
      free(gameInfo.resultDetails);
      gameInfo.resultDetails = NULL;
    }
  }

  /* In pausing && IcsExamining mode, we ignore boards coming
     in if they are in a different variation than we are. */
  if (pauseExamInvalid) return;
  if (pausing && gameMode == IcsExamining) {
    if (moveNum <= pauseExamForwardMostMove) {
      pauseExamInvalid = TRUE;
      forwardMostMove = pauseExamForwardMostMove;
      return;
    }
  }

  if (appData.debugMode) {
    fprintf(debugFP, "load %dx%d board\n", files, ranks);
  }
  /* Parse the board */
  for (k = 0; k < ranks; k++) {
    for (j = 0; j < files; j++)
      board[k][j+gameInfo.holdingsWidth] = CharToPiece(board_chars[(ranks-1-k)*(files+1) + j]);
    if(gameInfo.holdingsWidth > 1) {
      board[k][0] = board[k][BOARD_WIDTH-1] = EmptySquare;
      board[k][1] = board[k][BOARD_WIDTH-2] = (ChessSquare) 0;;
    }
  }
  if(moveNum==0 && gameInfo.variant == VariantSChess) {
    board[5][BOARD_RGHT+1] = WhiteAngel;
    board[6][BOARD_RGHT+1] = WhiteMarshall;
    board[1][0] = BlackMarshall;
    board[2][0] = BlackAngel;
    board[1][1] = board[2][1] = board[5][BOARD_RGHT] = board[6][BOARD_RGHT] = 1;
  }
  CopyBoard(boards[moveNum], board);
  boards[moveNum][HOLDINGS_SET] = 0; // [HGM] indicate holdings not set
  if (moveNum == 0) {
    startedFromSetupPosition =
      !CompareBoards(board, initialPosition);
    if(startedFromSetupPosition)
      initialRulePlies = irrev_count; /* [HGM] 50-move counter offset */
  }

  /* [HGM] Set castling rights. Take the outermost Rooks,
     to make it also work for FRC opening positions. Note that board12
     is really defective for later FRC positions, as it has no way to
     indicate which Rook can castle if they are on the same side of King.
     For the initial position we grant rights to the outermost Rooks,
     and remember thos rights, and we then copy them on positions
     later in an FRC game. This means WB might not recognize castlings with
     Rooks that have moved back to their original position as illegal,
     but in ICS mode that is not its job anyway.
     */
  if(moveNum == 0 || gameInfo.variant != VariantFischeRandom)
  { int i, j; ChessSquare wKing = WhiteKing, bKing = BlackKing;

    for(i=BOARD_LEFT, j=NoRights; i<BOARD_RGHT; i++)
      if(board[0][i] == WhiteRook) j = i;
    initialRights[0] = boards[moveNum][CASTLING][0] = (castle_ws == 0 && gameInfo.variant != VariantFischeRandom ? NoRights : j);
    for(i=BOARD_RGHT-1, j=NoRights; i>=BOARD_LEFT; i--)
      if(board[0][i] == WhiteRook) j = i;
    initialRights[1] = boards[moveNum][CASTLING][1] = (castle_wl == 0 && gameInfo.variant != VariantFischeRandom ? NoRights : j);
    for(i=BOARD_LEFT, j=NoRights; i<BOARD_RGHT; i++)
      if(board[BOARD_HEIGHT-1][i] == BlackRook) j = i;
    initialRights[3] = boards[moveNum][CASTLING][3] = (castle_bs == 0 && gameInfo.variant != VariantFischeRandom ? NoRights : j);
    for(i=BOARD_RGHT-1, j=NoRights; i>=BOARD_LEFT; i--)
      if(board[BOARD_HEIGHT-1][i] == BlackRook) j = i;
    initialRights[4] = boards[moveNum][CASTLING][4] = (castle_bl == 0 && gameInfo.variant != VariantFischeRandom ? NoRights : j);

    boards[moveNum][CASTLING][2] = boards[moveNum][CASTLING][5] = NoRights;
    if(gameInfo.variant == VariantKnightmate) { wKing = WhiteUnicorn; bKing = BlackUnicorn; }
    for(k=BOARD_LEFT; k<BOARD_RGHT; k++)
      if(board[0][k] == wKing) initialRights[2] = boards[moveNum][CASTLING][2] = k;
    for(k=BOARD_LEFT; k<BOARD_RGHT; k++)
      if(board[BOARD_HEIGHT-1][k] == bKing)
        initialRights[5] = boards[moveNum][CASTLING][5] = k;
    if(gameInfo.variant == VariantTwoKings) {
      // In TwoKings looking for a King does not work, so always give castling rights to a King on e1/e8
      if(board[0][4] == wKing) initialRights[2] = boards[moveNum][CASTLING][2] = 4;
      if(board[BOARD_HEIGHT-1][4] == bKing) initialRights[5] = boards[moveNum][CASTLING][5] = 4;
    }
  } else { int r;
    r = boards[moveNum][CASTLING][0] = initialRights[0];
    if(board[0][r] != WhiteRook) boards[moveNum][CASTLING][0] = NoRights;
    r = boards[moveNum][CASTLING][1] = initialRights[1];
    if(board[0][r] != WhiteRook) boards[moveNum][CASTLING][1] = NoRights;
    r = boards[moveNum][CASTLING][3] = initialRights[3];
    if(board[BOARD_HEIGHT-1][r] != BlackRook) boards[moveNum][CASTLING][3] = NoRights;
    r = boards[moveNum][CASTLING][4] = initialRights[4];
    if(board[BOARD_HEIGHT-1][r] != BlackRook) boards[moveNum][CASTLING][4] = NoRights;
    /* wildcastle kludge: always assume King has rights */
    r = boards[moveNum][CASTLING][2] = initialRights[2];
    r = boards[moveNum][CASTLING][5] = initialRights[5];
  }
  /* [HGM] e.p. rights. Assume that ICS sends file number here? */
  boards[moveNum][EP_STATUS] = EP_NONE;
  if(str[0] == 'P') boards[moveNum][EP_STATUS] = EP_PAWN_MOVE;
  if(strchr(move_str, 'x')) boards[moveNum][EP_STATUS] = EP_CAPTURE;
  if(double_push !=  -1) boards[moveNum][EP_STATUS] = double_push + BOARD_LEFT;


  if (ics_getting_history == H_GOT_REQ_HEADER ||
      ics_getting_history == H_GOT_UNREQ_HEADER) {
    /* This was an initial position from a move list, not
       the current position */
    return;
  }

  /* Update currentMove and known move number limits */
  newMove = newGame || moveNum > forwardMostMove;

  if (newGame) {
    forwardMostMove = backwardMostMove = currentMove = moveNum;
    if (gameMode == IcsExamining && moveNum == 0) {
      /* Workaround for ICS limitation: we are not told the wild
         type when starting to examine a game.  But if we ask for
         the move list, the move list header will tell us */
      ics_getting_history = H_REQUESTED;
      snprintf(str, MSG_SIZ, "%smoves %d\n", ics_prefix, gamenum);
      SendToICS(str);
    }
  } else if (moveNum == forwardMostMove + 1 || moveNum == forwardMostMove
      || (moveNum < forwardMostMove && moveNum >= backwardMostMove)) {
#if ZIPPY
    /* [DM] If we found takebacks during icsEngineAnalyze try send to engine */
    /* [HGM] applied this also to an engine that is silently watching        */
    if (appData.zippyPlay && moveNum < forwardMostMove && first.initDone &&
        (gameMode == IcsObserving || gameMode == IcsExamining) &&
        gameInfo.variant == currentlyInitializedVariant) {
      takeback = forwardMostMove - moveNum;
      for (i = 0; i < takeback; i++) {
        if (appData.debugMode) fprintf(debugFP, "take back move\n");
        SendToProgram("undo\n", &first);
      }
    }
#endif

    forwardMostMove = moveNum;
    if (!pausing || currentMove > forwardMostMove)
      currentMove = forwardMostMove;
  } else {
    /* New part of history that is not contiguous with old part */
    if (pausing && gameMode == IcsExamining) {
      pauseExamInvalid = TRUE;
      forwardMostMove = pauseExamForwardMostMove;
      return;
    }
    if (gameMode == IcsExamining && moveNum > 0 && appData.getMoveList) {
#if ZIPPY
      if(appData.zippyPlay && forwardMostMove > 0 && first.initDone) {
        // [HGM] when we will receive the move list we now request, it will be
        // fed to the engine from the first move on. So if the engine is not
        // in the initial position now, bring it there.
        InitChessProgram(&first, 0);
      }
#endif
      ics_getting_history = H_REQUESTED;
      snprintf(str, MSG_SIZ, "%smoves %d\n", ics_prefix, gamenum);
      SendToICS(str);
    }
    forwardMostMove = backwardMostMove = currentMove = moveNum;
  }

  /* Update the clocks */
  if (strchr(elapsed_time, '.')) {
    /* Time is in ms */
    timeRemaining[0][moveNum] = whiteTimeRemaining = white_time;
    timeRemaining[1][moveNum] = blackTimeRemaining = black_time;
  } else {
    /* Time is in seconds */
    timeRemaining[0][moveNum] = whiteTimeRemaining = white_time * 1000;
    timeRemaining[1][moveNum] = blackTimeRemaining = black_time * 1000;
  }


#if ZIPPY
  if (appData.zippyPlay && newGame &&
      gameMode != IcsObserving && gameMode != IcsIdle &&
      gameMode != IcsExamining)
    ZippyFirstBoard(moveNum, basetime, increment);
#endif

  /* Put the move on the move list, first converting
     to canonical algebraic form. */
  if (moveNum > 0) {
    if (appData.debugMode) {
      int f = forwardMostMove;
      fprintf(debugFP, "parseboard %d, castling = %d %d %d %d %d %d\n", f,
          boards[f][CASTLING][0],boards[f][CASTLING][1],boards[f][CASTLING][2],
          boards[f][CASTLING][3],boards[f][CASTLING][4],boards[f][CASTLING][5]);
      fprintf(debugFP, "accepted move %s from ICS, parse it.\n", move_str);
      fprintf(debugFP, "moveNum = %d\n", moveNum);
      fprintf(debugFP, "board = %d-%d x %d\n", BOARD_LEFT, BOARD_RGHT, BOARD_HEIGHT);
      setbuf(debugFP, NULL);
    }
    if (moveNum <= backwardMostMove) {
      /* We don't know what the board looked like before
         this move.  Punt. */
      safeStrCpy(parseList[moveNum - 1], move_str, sizeof(parseList[moveNum - 1])/sizeof(parseList[moveNum - 1][0]));
      strcat(parseList[moveNum - 1], " ");
      strcat(parseList[moveNum - 1], elapsed_time);
      moveList[moveNum - 1][0] = NULLCHAR;
    } else if (strcmp(move_str, "none") == 0) {
      // [HGM] long SAN: swapped order; test for 'none' before parsing move
      /* Again, we don't know what the board looked like;
         this is really the start of the game. */
      parseList[moveNum - 1][0] = NULLCHAR;
      moveList[moveNum - 1][0] = NULLCHAR;
      backwardMostMove = moveNum;
      startedFromSetupPosition = TRUE;
      fromX = fromY = toX = toY = -1;
    } else {
      // [HGM] long SAN: if legality-testing is off, disambiguation might not work or give wrong move.
      //                 So we parse the long-algebraic move string in stead of the SAN move
      int valid; char buf[MSG_SIZ], *prom;

      if(gameInfo.variant == VariantShogi && !strchr(move_str, '=') && !strchr(move_str, '@'))
        strcat(move_str, "="); // if ICS does not say 'promote' on non-drop, we defer.
      // str looks something like "Q/a1-a2"; kill the slash
      if(str[1] == '/')
        snprintf(buf, MSG_SIZ,"%c%s", str[0], str+2);
      else  safeStrCpy(buf, str, sizeof(buf)/sizeof(buf[0])); // might be castling
      if((prom = strstr(move_str, "=")) && !strstr(buf, "="))
        strcat(buf, prom); // long move lacks promo specification!
      if(!appData.testLegality && move_str[1] != '@') { // drops never ambiguous (parser chokes on long form!)
        if(appData.debugMode)
          fprintf(debugFP, "replaced ICS move '%s' by '%s'\n", move_str, buf);
        safeStrCpy(move_str, buf, MSG_SIZ);
      }
      valid = ParseOneMove(move_str, moveNum - 1, &moveType,
          &fromX, &fromY, &toX, &toY, &promoChar)
        || ParseOneMove(buf, moveNum - 1, &moveType,
            &fromX, &fromY, &toX, &toY, &promoChar);
      // end of long SAN patch
      if (valid) {
        (void) CoordsToAlgebraic(boards[moveNum - 1],
            PosFlags(moveNum - 1),
            fromY, fromX, toY, toX, promoChar,
            parseList[moveNum-1]);
        switch (MateTest(boards[moveNum], PosFlags(moveNum)) ) {
          case MT_NONE:
          case MT_STALEMATE:
          default:
            break;
          case MT_CHECK:
            if(!IS_SHOGI(gameInfo.variant))
              strcat(parseList[moveNum - 1], "+");
            break;
          case MT_CHECKMATE:
          case MT_STAINMATE: // [HGM] xq: for notation stalemate that wins counts as checkmate
            strcat(parseList[moveNum - 1], "#");
            break;
        }
        strcat(parseList[moveNum - 1], " ");
        strcat(parseList[moveNum - 1], elapsed_time);
        /* currentMoveString is set as a side-effect of ParseOneMove */
        if(gameInfo.variant == VariantShogi && currentMoveString[4]) currentMoveString[4] = '^';
        safeStrCpy(moveList[moveNum - 1], currentMoveString, sizeof(moveList[moveNum - 1])/sizeof(moveList[moveNum - 1][0]));
        strcat(moveList[moveNum - 1], "\n");

        if(gameInfo.holdingsWidth && !appData.disguise && gameInfo.variant != VariantSuper && gameInfo.variant != VariantGreat
            && gameInfo.variant != VariantGrand&& gameInfo.variant != VariantSChess) // inherit info that ICS does not give from previous board
          for(k=0; k<ranks; k++) for(j=BOARD_LEFT; j<BOARD_RGHT; j++) {
            ChessSquare old, new = boards[moveNum][k][j];
            if(fromY == DROP_RANK && k==toY && j==toX) continue; // dropped pieces always stand for themselves
            old = (k==toY && j==toX) ? boards[moveNum-1][fromY][fromX] : boards[moveNum-1][k][j]; // trace back mover
            if(old == new) continue;
            if(old == PROMOTED(new)) boards[moveNum][k][j] = old;// prevent promoted pieces to revert to primordial ones
            else if(new == WhiteWazir || new == BlackWazir) {
              if(old < WhiteCannon || old >= BlackPawn && old < BlackCannon)
                boards[moveNum][k][j] = PROMOTED(old); // choose correct type of Gold in promotion
              else boards[moveNum][k][j] = old; // preserve type of Gold
            } else if((old == WhitePawn || old == BlackPawn) && new != EmptySquare) // Pawn promotions (but not e.p.capture!)
              boards[moveNum][k][j] = PROMOTED(new); // use non-primordial representation of chosen piece
          }
      } else {
        /* Move from ICS was illegal!?  Punt. */
        if (appData.debugMode) {
          fprintf(debugFP, "Illegal move from ICS '%s'\n", move_str);
          fprintf(debugFP, "board L=%d, R=%d, H=%d, holdings=%d\n", BOARD_LEFT, BOARD_RGHT, BOARD_HEIGHT, gameInfo.holdingsWidth);
        }
        safeStrCpy(parseList[moveNum - 1], move_str, sizeof(parseList[moveNum - 1])/sizeof(parseList[moveNum - 1][0]));
        strcat(parseList[moveNum - 1], " ");
        strcat(parseList[moveNum - 1], elapsed_time);
        moveList[moveNum - 1][0] = NULLCHAR;
        fromX = fromY = toX = toY = -1;
      }
    }
    if (appData.debugMode) {
      fprintf(debugFP, "Move parsed to '%s'\n", parseList[moveNum - 1]);
      setbuf(debugFP, NULL);
    }

#if ZIPPY
    /* Send move to chess program (BEFORE animating it). */
    if (appData.zippyPlay && !newGame && newMove &&
        (!appData.getMoveList || backwardMostMove == 0) && first.initDone) {

      if ((gameMode == IcsPlayingWhite && WhiteOnMove(moveNum)) ||
          (gameMode == IcsPlayingBlack && !WhiteOnMove(moveNum))) {
        if (moveList[moveNum - 1][0] == NULLCHAR) {
          snprintf(str, MSG_SIZ, _("Couldn't parse move \"%s\" from ICS"),
              move_str);
          DisplayError(str, 0);
        } else {
          if (first.sendTime) {
            SendTimeRemaining(&first, gameMode == IcsPlayingWhite);
          }
          bookHit = SendMoveToBookUser(moveNum - 1, &first, FALSE); // [HGM] book
          if (firstMove && !bookHit) {
            firstMove = FALSE;
            if (first.useColors) {
              SendToProgram(gameMode == IcsPlayingWhite ?
                  "white\ngo\n" :
                  "black\ngo\n", &first);
            } else {
              SendToProgram("go\n", &first);
            }
            first.maybeThinking = TRUE;
          }
        }
      } else if (gameMode == IcsObserving || gameMode == IcsExamining) {
        if (moveList[moveNum - 1][0] == NULLCHAR) {
          snprintf(str, MSG_SIZ, _("Couldn't parse move \"%s\" from ICS"), move_str);
          DisplayError(str, 0);
        } else {
          if(gameInfo.variant == currentlyInitializedVariant) // [HGM] refrain sending moves engine can't understand!
            SendMoveToProgram(moveNum - 1, &first);
        }
      }
    }
#endif
  }

  if (moveNum > 0 && !gotPremove && !appData.noGUI) {
    /* If move comes from a remote source, animate it.  If it
       isn't remote, it will have already been animated. */
    if (!pausing && !ics_user_moved && prevMove == moveNum - 1) {
      AnimateMove(boards[moveNum - 1], fromX, fromY, toX, toY);
    }
    if (!pausing && appData.highlightLastMove) {
      SetHighlights(fromX, fromY, toX, toY);
    }
  }

  /* Start the clocks */
  whiteFlag = blackFlag = FALSE;
  appData.clockMode = !(basetime == 0 && increment == 0);
  if (ticking == 0) {
    ics_clock_paused = TRUE;
    StopClocks();
  } else if (ticking == 1) {
    ics_clock_paused = FALSE;
  }
  if (gameMode == IcsIdle ||
      relation == RELATION_OBSERVING_STATIC ||
      relation == RELATION_EXAMINING ||
      ics_clock_paused)
    DisplayBothClocks();
  else
    StartClocks();

  /* Display opponents and material strengths */
  if (gameInfo.variant != VariantBughouse &&
      gameInfo.variant != VariantCrazyhouse && !appData.noGUI) {
    if (tinyLayout || smallLayout) {
      if(gameInfo.variant == VariantNormal)
        snprintf(str, MSG_SIZ, "%s(%d) %s(%d) {%d %d}",
            gameInfo.white, white_stren, gameInfo.black, black_stren,
            basetime, increment);
      else
        snprintf(str, MSG_SIZ, "%s(%d) %s(%d) {%d %d w%d}",
            gameInfo.white, white_stren, gameInfo.black, black_stren,
            basetime, increment, (int) gameInfo.variant);
    } else {
      if(gameInfo.variant == VariantNormal)
        snprintf(str, MSG_SIZ, "%s (%d) %s %s (%d) {%d %d}",
            gameInfo.white, white_stren, _("vs."), gameInfo.black, black_stren,
            basetime, increment);
      else
        snprintf(str, MSG_SIZ, "%s (%d) %s %s (%d) {%d %d %s}",
            gameInfo.white, white_stren, _("vs."), gameInfo.black, black_stren,
            basetime, increment, VariantName(gameInfo.variant));
    }
    DisplayTitle(str);
    if (appData.debugMode) {
      fprintf(debugFP, "Display title '%s, gameInfo.variant = %d'\n", str, gameInfo.variant);
    }
  }


  /* Display the board */
  if (!pausing && !appData.noGUI) {

    if (appData.premove)
      if (!gotPremove ||
          ((gameMode == IcsPlayingWhite) && (WhiteOnMove(currentMove))) ||
          ((gameMode == IcsPlayingBlack) && (!WhiteOnMove(currentMove))))
        ClearPremoveHighlights();

    j = seekGraphUp; seekGraphUp = FALSE; // [HGM] seekgraph: when we draw a board, it overwrites the seek graph
    if(partnerUp) { flipView = originalFlip; partnerUp = FALSE; j = TRUE; } // [HGM] bughouse: restore view
    DrawPosition(j, boards[currentMove]);

    DisplayMove(moveNum - 1);
    if (appData.ringBellAfterMoves && /*!ics_user_moved*/ // [HGM] use absolute method to recognize own move
        !((gameMode == IcsPlayingWhite) && (!WhiteOnMove(moveNum)) ||
          (gameMode == IcsPlayingBlack) &&  (WhiteOnMove(moveNum))   ) ) {
      if(newMove) RingBell(); else PlayIcsUnfinishedSound();
    }
  }

  HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);
#if ZIPPY
  if(bookHit) { // [HGM] book: simulate book reply
    static char bookMove[MSG_SIZ]; // a bit generous?

    programStats.nodes = programStats.depth = programStats.time =
      programStats.score = programStats.got_only_move = 0;
    sprintf(programStats.movelist, "%s (xbook)", bookHit);

    safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
    strcat(bookMove, bookHit);
    HandleMachineMove(bookMove, &first);
  }
#endif
}

void GetMoveListEvent ()
{
  char buf[MSG_SIZ];
  if (appData.icsActive && gameMode != IcsIdle && ics_gamenum > 0) {
    ics_getting_history = H_REQUESTED;
    snprintf(buf, MSG_SIZ, "%smoves %d\n", ics_prefix, ics_gamenum);
    SendToICS(buf);
  }
}

void SendToBoth (char *msg)
{   // to make it easy to keep two engines in step in dual analysis
  SendToProgram(msg, &first);
  if(second.analyzing) SendToProgram(msg, &second);
}

void AnalysisPeriodicEvent (int force)
{
  if (((programStats.ok_to_send == 0 || programStats.line_is_book)
        && !force) || !appData.periodicUpdates)
    return;

  /* Send . command to Crafty to collect stats */
  SendToBoth(".\n");

  /* Don't send another until we get a response (this makes
     us stop sending to old Crafty's which don't understand
     the "." command (sending illegal cmds resets node count & time,
     which looks bad)) */
  programStats.ok_to_send = 0;
}

void ics_update_width (int new_width)
{
  ics_printf("set width %d\n", new_width);
}

void SendMoveToProgram (int moveNum, ChessProgramState *cps)
{
  char buf[MSG_SIZ];

  if(moveList[moveNum][1] == '@' && moveList[moveNum][0] == '@') {
    if(gameInfo.variant == VariantLion || gameInfo.variant == VariantChuChess || gameInfo.variant == VariantChu) {
      sprintf(buf, "%s@@@@\n", cps->useUsermove ? "usermove " : "");
      SendToProgram(buf, cps);
      return;
    }
    // null move in variant where engine does not understand it (for analysis purposes)
    SendBoard(cps, moveNum + 1); // send position after move in stead.
    return;
  }
  if (cps->useUsermove) {
    SendToProgram("usermove ", cps);
  }
  if (cps->useSAN) {
    char *space;
    if ((space = strchr(parseList[moveNum], ' ')) != NULL) {
      int len = space - parseList[moveNum];
      memcpy(buf, parseList[moveNum], len);
      buf[len++] = '\n';
      buf[len] = NULLCHAR;
    } else {
      snprintf(buf, MSG_SIZ,"%s\n", parseList[moveNum]);
    }
    SendToProgram(buf, cps);
  } else {
    if(cps->alphaRank) { /* [HGM] shogi: temporarily convert to shogi coordinates before sending */
      AlphaRank(moveList[moveNum], 4);
      SendToProgram(moveList[moveNum], cps);
      AlphaRank(moveList[moveNum], 4); // and back
    } else
      /* Added by Tord: Send castle moves in "O-O" in FRC games if required by
       * the engine. It would be nice to have a better way to identify castle
       * moves here. */
      if(appData.fischerCastling && cps->useOOCastle) {
        int fromX = moveList[moveNum][0] - AAA;
        int fromY = moveList[moveNum][1] - ONE;
        int toX = moveList[moveNum][2] - AAA;
        int toY = moveList[moveNum][3] - ONE;
        if((boards[moveNum][fromY][fromX] == WhiteKing
              && boards[moveNum][toY][toX] == WhiteRook)
            || (boards[moveNum][fromY][fromX] == BlackKing
              && boards[moveNum][toY][toX] == BlackRook)) {
          if(toX > fromX) SendToProgram("O-O\n", cps);
          else SendToProgram("O-O-O\n", cps);
        }
        else SendToProgram(moveList[moveNum], cps);
      } else
        if(moveList[moveNum][4] == ';') { // [HGM] lion: move is double-step over intermediate square
          char *m = moveList[moveNum];
          static char c[2];
          *c = m[7]; if(*c == '\n') *c = NULLCHAR; // promoChar
          if((boards[moveNum][m[6]-ONE][m[5]-AAA] < BlackPawn) == (boards[moveNum][m[1]-ONE][m[0]-AAA] < BlackPawn)) // move is kludge to indicate castling
            snprintf(buf, MSG_SIZ, "%c%d%c%d,%c%d%c%d\n", m[0], m[1] - '0', // convert to two moves
                m[2], m[3] - '0',
                m[5], m[6] - '0',
                m[2] + (m[0] > m[5] ? 1 : -1), m[3] - '0');
          else if(*c && m[8] != '\n') { // kill square followed by 2 characters: 2nd kill square rather than promo suffix
            *c = m[9]; if(*c == '\n') *c = NULLCHAR;
            snprintf(buf, MSG_SIZ, "%c%d%c%d,%c%d%c%d,%c%d%c%d%s\n", m[0], m[1] - '0', // convert to three moves
                m[7], m[8] - '0',
                m[7], m[8] - '0',
                m[5], m[6] - '0',
                m[5], m[6] - '0',
                m[2], m[3] - '0', c);
          } else
            snprintf(buf, MSG_SIZ, "%c%d%c%d,%c%d%c%d%s\n", m[0], m[1] - '0', // convert to two moves
                m[5], m[6] - '0',
                m[5], m[6] - '0',
                m[2], m[3] - '0', c);
          SendToProgram(buf, cps);
        } else
          if(BOARD_HEIGHT > 10) { // [HGM] big: convert ranks to double-digit where needed
            if(moveList[moveNum][1] == '@' && (BOARD_HEIGHT < 16 || moveList[moveNum][0] <= 'Z')) { // drop move
              if(moveList[moveNum][0]== '@') snprintf(buf, MSG_SIZ, "@@@@\n"); else
                snprintf(buf, MSG_SIZ, "%c@%c%d%s", moveList[moveNum][0],
                    moveList[moveNum][2], moveList[moveNum][3] - '0', moveList[moveNum]+4);
            } else
              snprintf(buf, MSG_SIZ, "%c%d%c%d%s", moveList[moveNum][0], moveList[moveNum][1] - '0',
                  moveList[moveNum][2], moveList[moveNum][3] - '0', moveList[moveNum]+4);
            SendToProgram(buf, cps);
          }
          else SendToProgram(moveList[moveNum], cps);
    /* End of additions by Tord */
  }

  /* [HGM] setting up the opening has brought engine in force mode! */
  /*       Send 'go' if we are in a mode where machine should play. */
  if( (moveNum == 0 && setboardSpoiledMachineBlack && cps == &first) &&
      (gameMode == TwoMachinesPlay   ||
#if ZIPPY
       gameMode == IcsPlayingBlack     || gameMode == IcsPlayingWhite ||
#endif
       gameMode == MachinePlaysBlack || gameMode == MachinePlaysWhite) ) {
    SendToProgram("go\n", cps);
    if (appData.debugMode) {
      fprintf(debugFP, "(extra)\n");
    }
  }
  setboardSpoiledMachineBlack = 0;
}

void SendMoveToICS (ChessMove moveType, int fromX, int fromY, int toX, int toY, char promoChar)
{
  char user_move[MSG_SIZ];
  char suffix[4];

  if(gameInfo.variant == VariantSChess && promoChar) {
    snprintf(suffix, 4, "=%c", toX == BOARD_WIDTH<<1 ? ToUpper(promoChar) : ToLower(promoChar));
    if(moveType == NormalMove) moveType = WhitePromotion; // kludge to do gating
  } else suffix[0] = NULLCHAR;

  switch (moveType) {
    default:
      snprintf(user_move, MSG_SIZ, _("say Internal error; bad moveType %d (%d,%d-%d,%d)"),
          (int)moveType, fromX, fromY, toX, toY);
      DisplayError(user_move + strlen("say "), 0);
      break;
    case WhiteKingSideCastle:
    case BlackKingSideCastle:
    case WhiteQueenSideCastleWild:
    case BlackQueenSideCastleWild:
      /* PUSH Fabien */
    case WhiteHSideCastleFR:
    case BlackHSideCastleFR:
      /* POP Fabien */
      snprintf(user_move, MSG_SIZ, "o-o%s\n", suffix);
      break;
    case WhiteQueenSideCastle:
    case BlackQueenSideCastle:
    case WhiteKingSideCastleWild:
    case BlackKingSideCastleWild:
      /* PUSH Fabien */
    case WhiteASideCastleFR:
    case BlackASideCastleFR:
      /* POP Fabien */
      snprintf(user_move, MSG_SIZ, "o-o-o%s\n",suffix);
      break;
    case WhiteNonPromotion:
    case BlackNonPromotion:
      sprintf(user_move, "%c%c%c%c==\n", AAA + fromX, ONE + fromY, AAA + toX, ONE + toY);
      break;
    case WhitePromotion:
    case BlackPromotion:
      if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
          gameInfo.variant == VariantMakruk)
        snprintf(user_move, MSG_SIZ, "%c%c%c%c=%c\n",
            AAA + fromX, ONE + fromY, AAA + toX, ONE + toY,
            PieceToChar(WhiteFerz));
      else if(gameInfo.variant == VariantGreat)
        snprintf(user_move, MSG_SIZ,"%c%c%c%c=%c\n",
            AAA + fromX, ONE + fromY, AAA + toX, ONE + toY,
            PieceToChar(WhiteMan));
      else
        snprintf(user_move, MSG_SIZ, "%c%c%c%c=%c\n",
            AAA + fromX, ONE + fromY, AAA + toX, ONE + toY,
            promoChar);
      break;
    case WhiteDrop:
    case BlackDrop:
drop:
      snprintf(user_move, MSG_SIZ, "%c@%c%c\n",
          ToUpper(PieceToChar((ChessSquare) fromX)),
          AAA + toX, ONE + toY);
      break;
    case IllegalMove:  /* could be a variant we don't quite understand */
      if(fromY == DROP_RANK) goto drop; // We need 'IllegalDrop' move type?
    case NormalMove:
    case WhiteCapturesEnPassant:
    case BlackCapturesEnPassant:
      snprintf(user_move, MSG_SIZ,"%c%c%c%c\n",
          AAA + fromX, ONE + fromY, AAA + toX, ONE + toY);
      break;
  }
  SendToICS(user_move);
  if(appData.keepAlive) // [HGM] alive: schedule sending of dummy 'date' command
    ScheduleDelayedEvent(KeepAlive, appData.keepAlive*60*1000);
}

void UploadGameEvent ()
{   // [HGM] upload: send entire stored game to ICS as long-algebraic moves.
  int i, last = forwardMostMove; // make sure ICS reply cannot pre-empt us by clearing fmm
  static char *castlingStrings[4] = { "none", "kside", "qside", "both" };
  if(gameMode == IcsObserving || gameMode == IcsPlayingBlack || gameMode == IcsPlayingWhite) {
    DisplayError(_("You cannot do this while you are playing or observing"), 0);
    return;
  }
  if(gameMode != IcsExamining) { // is this ever not the case?
    char buf[MSG_SIZ], *p, *fen, command[MSG_SIZ], bsetup = 0;

    if(ics_type == ICS_ICC) { // on ICC match ourselves in applicable variant
      snprintf(command,MSG_SIZ, "match %s", ics_handle);
    } else { // on FICS we must first go to general examine mode
      safeStrCpy(command, "examine\nbsetup", sizeof(command)/sizeof(command[0])); // and specify variant within it with bsetups
    }
    if(gameInfo.variant != VariantNormal) {
      // try figure out wild number, as xboard names are not always valid on ICS
      for(i=1; i<=36; i++) {
        snprintf(buf, MSG_SIZ, "wild/%d", i);
        if(StringToVariant(buf) == gameInfo.variant) break;
      }
      if(i<=36 && ics_type == ICS_ICC) snprintf(buf, MSG_SIZ,"%s w%d\n", command, i);
      else if(i == 22) snprintf(buf,MSG_SIZ, "%s fr\n", command);
      else snprintf(buf, MSG_SIZ,"%s %s\n", command, VariantName(gameInfo.variant));
    } else snprintf(buf, MSG_SIZ,"%s\n", ics_type == ICS_ICC ? command : "examine\n"); // match yourself or examine
    SendToICS(ics_prefix);
    SendToICS(buf);
    if(startedFromSetupPosition || backwardMostMove != 0) {
      fen = PositionToFEN(backwardMostMove, NULL, 1);
      if(ics_type == ICS_ICC) { // on ICC we can simply send a complete FEN to set everything
        snprintf(buf, MSG_SIZ,"loadfen %s\n", fen);
        SendToICS(buf);
      } else { // FICS: everything has to set by separate bsetup commands
        p = strchr(fen, ' '); p[0] = NULLCHAR; // cut after board
        snprintf(buf, MSG_SIZ,"bsetup fen %s\n", fen);
        SendToICS(buf);
        if(!WhiteOnMove(backwardMostMove)) {
          SendToICS("bsetup tomove black\n");
        }
        i = (strchr(p+3, 'K') != NULL) + 2*(strchr(p+3, 'Q') != NULL);
        snprintf(buf, MSG_SIZ,"bsetup wcastle %s\n", castlingStrings[i]);
        SendToICS(buf);
        i = (strchr(p+3, 'k') != NULL) + 2*(strchr(p+3, 'q') != NULL);
        snprintf(buf, MSG_SIZ, "bsetup bcastle %s\n", castlingStrings[i]);
        SendToICS(buf);
        i = boards[backwardMostMove][EP_STATUS];
        if(i >= 0) { // set e.p.
          snprintf(buf, MSG_SIZ,"bsetup eppos %c\n", i+AAA);
          SendToICS(buf);
        }
        bsetup++;
      }
    }
    if(bsetup || ics_type != ICS_ICC && gameInfo.variant != VariantNormal)
      SendToICS("bsetup done\n"); // switch to normal examining.
  }
  for(i = backwardMostMove; i<last; i++) {
    char buf[20];
    snprintf(buf, sizeof(buf)/sizeof(buf[0]),"%s\n", parseList[i]);
    if((*buf == 'b' || *buf == 'B') && buf[1] == 'x') { // work-around for stupid FICS bug, which thinks bxc3 can be a Bishop move
      int len = strlen(moveList[i]);
      snprintf(buf, sizeof(buf)/sizeof(buf[0]),"%s", moveList[i]); // use long algebraic
      if(!isdigit(buf[len-2])) snprintf(buf+len-2, 20-len, "=%c\n", ToUpper(buf[len-2])); // promotion must have '=' in ICS format
    }
    SendToICS(buf);
  }
  SendToICS(ics_prefix);
  SendToICS(ics_type == ICS_ICC ? "tag result Game in progress\n" : "commit\n");
}

int killX = -1, killY = -1, kill2X = -1, kill2Y = -1; // [HGM] lion: used for passing e.p. capture square to MakeMove
int legNr = 1;

void CoordsToComputerAlgebraic (int rf, int ff, int rt, int ft, char promoChar, char move[9])
{
  if (rf == DROP_RANK) {
    if(ff == EmptySquare) sprintf(move, "@@@@\n"); else // [HGM] pass
      sprintf(move, "%c@%c%c\n",
          ToUpper(PieceToChar((ChessSquare) ff)), AAA + ft, ONE + rt);
  } else {
    if (promoChar == 'x' || promoChar == NULLCHAR) {
      sprintf(move, "%c%c%c%c\n",
          AAA + ff, ONE + rf, AAA + ft, ONE + rt);
      if(killX >= 0 && killY >= 0) {
        sprintf(move+4, ";%c%c\n", AAA + killX, ONE + killY);
        if(kill2X >= 0 && kill2Y >= 0) sprintf(move+7, "%c%c\n", AAA + kill2X, ONE + kill2Y);
      }
    } else {
      sprintf(move, "%c%c%c%c%c\n",
          AAA + ff, ONE + rf, AAA + ft, ONE + rt, promoChar);
      if(killX >= 0 && killY >= 0) {
        sprintf(move+4, ";%c%c%c\n", AAA + killX, ONE + killY, promoChar);
        if(kill2X >= 0 && kill2Y >= 0) sprintf(move+7, "%c%c%c\n", AAA + kill2X, ONE + kill2Y, promoChar);
      }
    }
  }
}

void ProcessICSInitScript (FILE *f)
{
  char buf[MSG_SIZ];

  while (fgets(buf, MSG_SIZ, f)) {
    SendToICSDelayed(buf,(long)appData.msLoginDelay);
  }

  fclose(f);
}


static int lastX, lastY, lastLeftX, lastLeftY, selectFlag;
int dragging;
static ClickType lastClickType;

int PieceInString (char *s, ChessSquare piece)
{
  char *p, ID = ToUpper(PieceToChar(piece)), suffix = PieceSuffix(piece);
  while((p = strchr(s, ID))) {
    if(!suffix || p[1] == suffix) return TRUE;
    s = p;
  }
  return FALSE;
}

int Partner (ChessSquare *p)
{ // change piece into promotion partner if one shogi-promotes to the other
  ChessSquare partner = promoPartner[*p];
  if(PieceToChar(*p) != '+' && PieceToChar(partner) != '+') return 0;
  if(PieceToChar(*p) == '+') partner = boards[currentMove][fromY][fromX];
  *p = partner;
  return 1;
}

void Sweep (int step)
{
  ChessSquare king = WhiteKing, pawn = WhitePawn, last = promoSweep;
  static int toggleFlag;
  if(gameInfo.variant == VariantKnightmate) king = WhiteUnicorn;
  if(gameInfo.variant == VariantSuicide || gameInfo.variant == VariantGiveaway) king = EmptySquare;
  if(promoSweep >= BlackPawn) king = WHITE_TO_BLACK king, pawn = WHITE_TO_BLACK pawn;
  if(gameInfo.variant == VariantSpartan && pawn == BlackPawn) pawn = BlackLance, king = EmptySquare;
  if(fromY != BOARD_HEIGHT-2 && fromY != 1 && gameInfo.variant != VariantChuChess) pawn = EmptySquare;
  if(!step) toggleFlag = Partner(&last); // piece has shogi-promotion
  do {
    if(step && !(toggleFlag && Partner(&promoSweep))) promoSweep -= step;
    if(promoSweep == EmptySquare) promoSweep = BlackPawn; // wrap
    else if((int)promoSweep == -1) promoSweep = WhiteKing;
    else if(promoSweep == BlackPawn && step < 0 && !toggleFlag) promoSweep = WhitePawn;
    else if(promoSweep == WhiteKing && step > 0 && !toggleFlag) promoSweep = BlackKing;
    if(!step) step = -1;
  } while(PieceToChar(promoSweep) == '.' || PieceToChar(promoSweep) == '~' ||
      !toggleFlag && PieceToChar(promoSweep) == '+' || // skip promoted versions of other
      promoRestrict[0] ? !PieceInString(promoRestrict, promoSweep) : // if choice set available, use it 
      promoSweep == pawn ||
      appData.testLegality && (promoSweep == king || gameInfo.variant != VariantChuChess &&
        (promoSweep == WhiteLion || promoSweep == BlackLion)));
  if(toX >= 0) {
    int victim = boards[currentMove][toY][toX];
    boards[currentMove][toY][toX] = promoSweep;
    DrawPosition(FALSE, boards[currentMove]);
    boards[currentMove][toY][toX] = victim;
  } else
    ChangeDragPiece(promoSweep);
}

int PromoScroll (int x, int y)
{
  int step = 0;

  if(promoSweep == EmptySquare || !appData.sweepSelect) return FALSE;
  if(abs(x - lastX) < 25 && abs(y - lastY) < 25) return FALSE;
  if( y > lastY + 2 ) step = -1; else if(y < lastY - 2) step = 1;
  if(!step) return FALSE;
  lastX = x; lastY = y;
  if((promoSweep < BlackPawn) == flipView) step = -step;
  if(step > 0) selectFlag = 1;
  if(!selectFlag) Sweep(step);
  return FALSE;
}

void NextPiece (int step)
{
  ChessSquare piece = boards[currentMove][toY][toX];
  do {
    pieceSweep -= step;
    if(pieceSweep == EmptySquare) pieceSweep = WhitePawn; // wrap
    if((int)pieceSweep == -1) pieceSweep = BlackKing;
    if(!step) step = -1;
  } while(PieceToChar(pieceSweep) == '.');
  boards[currentMove][toY][toX] = pieceSweep;
  DrawPosition(FALSE, boards[currentMove]);
  boards[currentMove][toY][toX] = piece;
}
/* [HGM] Shogi move preprocessor: swap digits for letters, vice versa */
void AlphaRank (char *move, int n)
{
  //    char *p = move, c; int x, y;

  if (appData.debugMode) {
    fprintf(debugFP, "alphaRank(%s,%d)\n", move, n);
  }

  if(move[1]=='*' &&
      move[2]>='0' && move[2]<='9' &&
      move[3]>='a' && move[3]<='x'    ) {
    move[1] = '@';
    move[2] = BOARD_RGHT  -1 - (move[2]-'1') + AAA;
    move[3] = BOARD_HEIGHT-1 - (move[3]-'a') + ONE;
  } else
    if(move[0]>='0' && move[0]<='9' &&
        move[1]>='a' && move[1]<='x' &&
        move[2]>='0' && move[2]<='9' &&
        move[3]>='a' && move[3]<='x'    ) {
      /* input move, Shogi -> normal */
      move[0] = BOARD_RGHT  -1 - (move[0]-'1') + AAA;
      move[1] = BOARD_HEIGHT-1 - (move[1]-'a') + ONE;
      move[2] = BOARD_RGHT  -1 - (move[2]-'1') + AAA;
      move[3] = BOARD_HEIGHT-1 - (move[3]-'a') + ONE;
    } else
      if(move[1]=='@' &&
          move[3]>='0' && move[3]<='9' &&
          move[2]>='a' && move[2]<='x'    ) {
        move[1] = '*';
        move[2] = BOARD_RGHT - 1 - (move[2]-AAA) + '1';
        move[3] = BOARD_HEIGHT-1 - (move[3]-ONE) + 'a';
      } else
        if(
            move[0]>='a' && move[0]<='x' &&
            move[3]>='0' && move[3]<='9' &&
            move[2]>='a' && move[2]<='x'    ) {
          /* output move, normal -> Shogi */
          move[0] = BOARD_RGHT - 1 - (move[0]-AAA) + '1';
          move[1] = BOARD_HEIGHT-1 - (move[1]-ONE) + 'a';
          move[2] = BOARD_RGHT - 1 - (move[2]-AAA) + '1';
          move[3] = BOARD_HEIGHT-1 - (move[3]-ONE) + 'a';
          if(move[4] == PieceToChar(BlackQueen)) move[4] = '+';
        }
  if (appData.debugMode) {
    fprintf(debugFP, "   out = '%s'\n", move);
  }
}

char yy_textstr[8000];

/* Parser for moves from gnuchess, ICS, or user typein box */
Boolean ParseOneMove (char *move, int moveNum, ChessMove *moveType, int *fromX, int *fromY, int *toX, int *toY, char *promoChar)
{
  *moveType = yylexstr(moveNum, move, yy_textstr, sizeof yy_textstr);

  switch (*moveType) {
    case WhitePromotion:
    case BlackPromotion:
    case WhiteNonPromotion:
    case BlackNonPromotion:
    case NormalMove:
    case FirstLeg:
    case WhiteCapturesEnPassant:
    case BlackCapturesEnPassant:
    case WhiteKingSideCastle:
    case WhiteQueenSideCastle:
    case BlackKingSideCastle:
    case BlackQueenSideCastle:
    case WhiteKingSideCastleWild:
    case WhiteQueenSideCastleWild:
    case BlackKingSideCastleWild:
    case BlackQueenSideCastleWild:
      /* Code added by Tord: */
    case WhiteHSideCastleFR:
    case WhiteASideCastleFR:
    case BlackHSideCastleFR:
    case BlackASideCastleFR:
      /* End of code added by Tord */
    case IllegalMove:		/* bug or odd chess variant */
      if(currentMoveString[1] == '@') { // illegal drop
        *fromX = WhiteOnMove(moveNum) ?
          (int) CharToPiece(ToUpper(currentMoveString[0])) :
          (int) CharToPiece(ToLower(currentMoveString[0]));
        goto drop;
      }
      *fromX = currentMoveString[0] - AAA;
      *fromY = currentMoveString[1] - ONE;
      *toX = currentMoveString[2] - AAA;
      *toY = currentMoveString[3] - ONE;
      *promoChar = currentMoveString[4];
      if(*promoChar == ';') *promoChar = currentMoveString[7 + 2*(currentMoveString[8] != 0)];
      if (*fromX < BOARD_LEFT || *fromX >= BOARD_RGHT || *fromY < 0 || *fromY >= BOARD_HEIGHT ||
          *toX < BOARD_LEFT || *toX >= BOARD_RGHT || *toY < 0 || *toY >= BOARD_HEIGHT) {
        if (appData.debugMode) {
          fprintf(debugFP, "Off-board move (%d,%d)-(%d,%d)%c, type = %d\n", *fromX, *fromY, *toX, *toY, *promoChar, *moveType);
        }
        *fromX = *fromY = *toX = *toY = 0;
        return FALSE;
      }
      if (appData.testLegality) {
        return (*moveType != IllegalMove);
      } else {
        return !(*fromX == *toX && *fromY == *toY && killX < 0) && boards[moveNum][*fromY][*fromX] != EmptySquare &&
          // [HGM] lion: if this is a double move we are less critical
          WhiteOnMove(moveNum) == (boards[moveNum][*fromY][*fromX] < BlackPawn);
      }

    case WhiteDrop:
    case BlackDrop:
      *fromX = *moveType == WhiteDrop ?
        (int) CharToPiece(ToUpper(currentMoveString[0])) :
        (int) CharToPiece(ToLower(currentMoveString[0]));
drop:
      *fromY = DROP_RANK;
      *toX = currentMoveString[2] - AAA;
      *toY = currentMoveString[3] - ONE;
      *promoChar = NULLCHAR;
      return TRUE;

    case AmbiguousMove:
    case ImpossibleMove:
    case EndOfFile:
    case ElapsedTime:
    case Comment:
    case PGNTag:
    case NAG:
    case WhiteWins:
    case BlackWins:
    case GameIsDrawn:
    default:
      if (appData.debugMode) {
        fprintf(debugFP, "Impossible move %s, type = %d\n", currentMoveString, *moveType);
      }
      /* bug? */
      *fromX = *fromY = *toX = *toY = 0;
      *promoChar = NULLCHAR;
      return FALSE;
  }
}

Boolean pushed = FALSE;
char *lastParseAttempt;

void ParsePV (char *pv, Boolean storeComments, Boolean atEnd)
{ // Parse a string of PV moves, and append to current game, behind forwardMostMove
  int fromX, fromY, toX, toY; char promoChar;
  ChessMove moveType;
  Boolean valid;
  int nr = 0;

  lastParseAttempt = pv; if(!*pv) return;    // turns out we crash when we parse an empty PV
  if ((gameMode == AnalyzeMode || gameMode == AnalyzeFile) && currentMove < forwardMostMove) {
    PushInner(currentMove, forwardMostMove); // [HGM] engine might not be thinking on forwardMost position!
    pushed = TRUE;
  }
  endPV = forwardMostMove;
  do {
    while(*pv == ' ' || *pv == '\n' || *pv == '\t') pv++; // must still read away whitespace
    if(nr == 0 && !storeComments && *pv == '(') pv++; // first (ponder) move can be in parentheses
    lastParseAttempt = pv;
    valid = ParseOneMove(pv, endPV, &moveType, &fromX, &fromY, &toX, &toY, &promoChar);
    if(!valid && nr == 0 &&
        ParseOneMove(pv, endPV-1, &moveType, &fromX, &fromY, &toX, &toY, &promoChar)){
      nr++; moveType = Comment; // First move has been played; kludge to make sure we continue
      // Hande case where played move is different from leading PV move
      CopyBoard(boards[endPV+1], boards[endPV-1]); // tentatively unplay last game move
      CopyBoard(boards[endPV+2], boards[endPV-1]); // and play first move of PV
      ApplyMove(fromX, fromY, toX, toY, promoChar, boards[endPV+2]);
      if(!CompareBoards(boards[endPV], boards[endPV+2])) {
        endPV += 2; // if position different, keep this
        moveList[endPV-1][0] = fromX + AAA;
        moveList[endPV-1][1] = fromY + ONE;
        moveList[endPV-1][2] = toX + AAA;
        moveList[endPV-1][3] = toY + ONE;
        parseList[endPV-1][0] = NULLCHAR;
        safeStrCpy(moveList[endPV-2], "_0_0", sizeof(moveList[endPV-2])/sizeof(moveList[endPV-2][0])); // suppress premove highlight on takeback move
      }
    }
    pv = strstr(pv, yy_textstr) + strlen(yy_textstr); // skip what we parsed
    if(nr == 0 && !storeComments && *pv == ')') pv++; // closing parenthesis of ponder move;
    if(moveType == Comment && storeComments) AppendComment(endPV, yy_textstr, FALSE);
    if(moveType == Comment || moveType == NAG || moveType == ElapsedTime) {
      valid++; // allow comments in PV
      continue;
    }
    nr++;
    if(endPV+1 > framePtr) break; // no space, truncate
    if(!valid) break;
    endPV++;
    CopyBoard(boards[endPV], boards[endPV-1]);
    ApplyMove(fromX, fromY, toX, toY, promoChar, boards[endPV]);
    CoordsToComputerAlgebraic(fromY, fromX, toY, toX, promoChar, moveList[endPV - 1]);
    strncat(moveList[endPV-1], "\n", MOVE_LEN);
    CoordsToAlgebraic(boards[endPV - 1],
        PosFlags(endPV - 1),
        fromY, fromX, toY, toX, promoChar,
        parseList[endPV - 1]);
  } while(valid);
    if(atEnd == 2) return; // used hidden, for PV conversion
    currentMove = (atEnd || endPV == forwardMostMove) ? endPV : forwardMostMove + 1;
    if(currentMove == forwardMostMove) ClearPremoveHighlights();
    else SetPremoveHighlights(moveList[currentMove-1][0]-AAA,
        moveList[currentMove-1][1]-ONE, moveList[currentMove-1][2]-AAA,
        moveList[currentMove-1][3]-ONE);
    DrawPosition(TRUE, boards[currentMove]);
}

int MultiPV (ChessProgramState *cps, int kind)
{	// check if engine supports MultiPV, and if so, return the number of the option that sets it
  int i;
  for(i=0; i<cps->nrOptions; i++) {
    char *s = cps->option[i].name;
    if((kind & 1) && !StrCaseCmp(s, "MultiPV") && cps->option[i].type == Spin) return i;
    if((kind & 2) && StrCaseStr(s, "multi") && StrCaseStr(s, "PV")
        && StrCaseStr(s, "margin") && cps->option[i].type == Spin) return -i-2;
  }
  return -1;
}

Boolean extendGame; // signals to UnLoadPV() if walked part of PV has to be appended to game
static int multi, pv_margin;
static ChessProgramState *activeCps;

Boolean LoadMultiPV (int x, int y, char *buf, int index, int *start, int *end, int pane)
{
  int startPV, lineStart, origIndex = index;
  char *p, buf2[MSG_SIZ];
  ChessProgramState *cps = (pane ? &second : &first);

  if(index < 0 || index >= strlen(buf)) return FALSE; // sanity
  lastX = x; lastY = y;
  while(index > 0 && buf[index-1] != '\n') index--; // beginning of line
  lineStart = startPV = index;
  while(buf[index] != '\n') if(buf[index++] == '\t') startPV = index;
  if(index == startPV && (p = StrCaseStr(buf+index, "PV="))) startPV = p - buf + 3;
  index = startPV;
  do{ while(buf[index] && buf[index] != '\n') index++;
  } while(buf[index] == '\n' && buf[index+1] == '\\' && buf[index+2] == ' ' && index++); // join kibitzed PV continuation line
  buf[index] = 0;
  if(lineStart == 0 && gameMode == AnalyzeMode) {
    int n = 0;
    if(origIndex > 17 && origIndex < 24) n--; else if(origIndex > index - 6) n++;
    if(n == 0) { // click not on "fewer" or "more"
      if((multi = -2 - MultiPV(cps, 2)) >= 0) {
        pv_margin = cps->option[multi].value;
        activeCps = cps; // non-null signals margin adjustment
      }
    } else if((multi = MultiPV(cps, 1)) >= 0) {
      n += cps->option[multi].value; if(n < 1) n = 1;
      snprintf(buf2, MSG_SIZ, "option MultiPV=%d\n", n);
      if(cps->option[multi].value != n) SendToProgram(buf2, cps);
      cps->option[multi].value = n;
      *start = *end = 0;
      return FALSE;
    }
  } else if(strstr(buf+lineStart, "exclude:") == buf+lineStart) { // exclude moves clicked
    ExcludeClick(origIndex - lineStart);
    return FALSE;
  } else if(!strncmp(buf+lineStart, "dep\t", 4)) {                // column headers clicked
    Collapse(origIndex - lineStart);
    return FALSE;
  }
  ParsePV(buf+startPV, FALSE, gameMode != AnalyzeMode);
  *start = startPV; *end = index-1;
  extendGame = (gameMode == AnalyzeMode && appData.autoExtend && origIndex - startPV < 5);
  return TRUE;
}

char *PvToSAN (char *pv)
{
  static char buf[10*MSG_SIZ];
  int i, k=0, savedEnd=endPV, saveFMM = forwardMostMove;
  *buf = NULLCHAR;
  if(forwardMostMove < endPV) PushInner(forwardMostMove, endPV); // shelve PV of PV-walk
  ParsePV(pv, FALSE, 2); // this appends PV to game, suppressing any display of it
  for(i = forwardMostMove; i<endPV; i++){
    if(i&1) snprintf(buf+k, 10*MSG_SIZ-k, "%s ", parseList[i]);
    else    snprintf(buf+k, 10*MSG_SIZ-k, "%d. %s ", i/2 + 1, parseList[i]);
    k += strlen(buf+k);
  }
  snprintf(buf+k, 10*MSG_SIZ-k, "%s", lastParseAttempt); // if we ran into stuff that could not be parsed, print it verbatim
  if(pushed) { PopInner(0); pushed = FALSE; } // restore game continuation shelved by ParsePV
  if(forwardMostMove < savedEnd) { PopInner(0); forwardMostMove = saveFMM; } // PopInner would set fmm to endPV!
  endPV = savedEnd;
  return buf;
}

Boolean LoadPV (int x, int y)
{ // called on right mouse click to load PV
  int which = gameMode == TwoMachinesPlay && (WhiteOnMove(forwardMostMove) == (second.twoMachinesColor[0] == 'w'));
  lastX = x; lastY = y;
  ParsePV(lastPV[which], FALSE, TRUE); // load the PV of the thinking engine in the boards array.
  extendGame = FALSE;
  return TRUE;
}

void UnLoadPV ()
{
  int oldFMM = forwardMostMove; // N.B.: this was currentMove before PV was loaded!
  if(activeCps) {
    if(pv_margin != activeCps->option[multi].value) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "option %s=%d\n", "Multi-PV Margin", pv_margin);
      SendToProgram(buf, activeCps);
      activeCps->option[multi].value = pv_margin;
    }
    activeCps = NULL;
    return;
  }
  if(endPV < 0) return;
  if(appData.autoCopyPV) CopyFENToClipboard();
  endPV = -1;
  if(extendGame && currentMove > forwardMostMove) {
    Boolean saveAnimate = appData.animate;
    if(pushed) {
      if(shiftKey && storedGames < MAX_VARIATIONS-2) { // wants to start variation, and there is space
        if(storedGames == 1) GreyRevert(FALSE);      // we already pushed the tail, so just make it official
      } else storedGames--; // abandon shelved tail of original game
    }
    pushed = FALSE;
    forwardMostMove = currentMove;
    currentMove = oldFMM;
    appData.animate = FALSE;
    ToNrEvent(forwardMostMove);
    appData.animate = saveAnimate;
  }
  currentMove = forwardMostMove;
  if(pushed) { PopInner(0); pushed = FALSE; } // restore shelved game continuation
  ClearPremoveHighlights();
  DrawPosition(TRUE, boards[currentMove]);
}

void MovePV (int x, int y, int h)
{ // step through PV based on mouse coordinates (called on mouse move)
  int margin = h>>3, step = 0, threshold = (pieceSweep == EmptySquare ? 10 : 15);

  if(activeCps) { // adjusting engine's multi-pv margin
    if(x > lastX) pv_margin++; else
      if(x < lastX) pv_margin -= (pv_margin > 0);
    if(x != lastX) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "margin = %d", pv_margin);
      DisplayMessage(buf, "");
    }
    lastX = x;
    return;
  }
  // we must somehow check if right button is still down (might be released off board!)
  if(endPV < 0 && pieceSweep == EmptySquare) return; // needed in XBoard because lastX/Y is shared :-(
  if(abs(x - lastX) < threshold && abs(y - lastY) < threshold) return;
  if( y > lastY + 2 ) step = -1; else if(y < lastY - 2) step = 1;
  if(!step) return;
  lastX = x; lastY = y;

  if(pieceSweep != EmptySquare) { NextPiece(step); return; }
  if(endPV < 0) return;
  if(y < margin) step = 1; else
    if(y > h - margin) step = -1;
  if(currentMove + step > endPV || currentMove + step < forwardMostMove) step = 0;
  currentMove += step;
  if(currentMove == forwardMostMove) ClearPremoveHighlights(); else
    SetPremoveHighlights(moveList[currentMove-1][0]-AAA, moveList[currentMove-1][1]-ONE,
        moveList[currentMove-1][2]-AAA, moveList[currentMove-1][3]-ONE);
  DrawPosition(FALSE, boards[currentMove]);
}


// [HGM] shuffle: a general way to suffle opening setups, applicable to arbitrary variants.
// All positions will have equal probability, but the current method will not provide a unique
// numbering scheme for arrays that contain 3 or more pieces of the same kind.
#define DARK 1
#define LITE 2
#define ANY 3

int squaresLeft[4];
int piecesLeft[(int)BlackPawn];
int seed, nrOfShuffles;

void GetPositionNumber ()
{	// sets global variable seed
  int i;

  seed = appData.defaultFrcPosition;
  if(seed < 0) { // randomize based on time for negative FRC position numbers
    for(i=0; i<50; i++) seed += random();
    seed = random() ^ random() >> 8 ^ random() << 8;
    if(seed<0) seed = -seed;
  }
}

int put (Board board, int pieceType, int rank, int n, int shade)
  // put the piece on the (n-1)-th empty squares of the given shade
{
  int i;

  for(i=BOARD_LEFT; i<BOARD_RGHT; i++) {
    if( (((i-BOARD_LEFT)&1)+1) & shade && board[rank][i] == EmptySquare && n-- == 0) {
      board[rank][i] = (ChessSquare) pieceType;
      squaresLeft[((i-BOARD_LEFT)&1) + 1]--;
      squaresLeft[ANY]--;
      piecesLeft[pieceType]--;
      return i;
    }
  }
  return -1;
}


void AddOnePiece (Board board, int pieceType, int rank, int shade)
  // calculate where the next piece goes, (any empty square), and put it there
{
  int i;

  i = seed % squaresLeft[shade];
  nrOfShuffles *= squaresLeft[shade];
  seed /= squaresLeft[shade];
  put(board, pieceType, rank, i, shade);
}

void AddTwoPieces (Board board, int pieceType, int rank)
  // calculate where the next 2 identical pieces go, (any empty square), and put it there
{
  int i, n=squaresLeft[ANY], j=n-1, k;

  k = n*(n-1)/2; // nr of possibilities, not counting permutations
  i = seed % k;  // pick one
  nrOfShuffles *= k;
  seed /= k;
  while(i >= j) i -= j--;
  j = n - 1 - j; i += j;
  put(board, pieceType, rank, j, ANY);
  put(board, pieceType, rank, i, ANY);
}

void SetUpShuffle (Board board, int number)
{
  int i, p, first=1;

  GetPositionNumber(); nrOfShuffles = 1;

  squaresLeft[DARK] = (BOARD_RGHT - BOARD_LEFT + 1)/2;
  squaresLeft[ANY]  = BOARD_RGHT - BOARD_LEFT;
  squaresLeft[LITE] = squaresLeft[ANY] - squaresLeft[DARK];

  for(p = 0; p<=(int)WhiteKing; p++) piecesLeft[p] = 0;

  for(i=BOARD_LEFT; i<BOARD_RGHT; i++) { // count pieces and clear board
    p = (int) board[0][i];
    if(p < (int) BlackPawn) piecesLeft[p] ++;
    board[0][i] = EmptySquare;
  }

  if(PosFlags(0) & F_ALL_CASTLE_OK) {
    // shuffles restricted to allow normal castling put KRR first
    if(piecesLeft[(int)WhiteKing]) // King goes rightish of middle
      put(board, WhiteKing, 0, (gameInfo.boardWidth+1)/2, ANY);
    else if(piecesLeft[(int)WhiteUnicorn]) // in Knightmate Unicorn castles
      put(board, WhiteUnicorn, 0, (gameInfo.boardWidth+1)/2, ANY);
    if(piecesLeft[(int)WhiteRook]) // First supply a Rook for K-side castling
      put(board, WhiteRook, 0, gameInfo.boardWidth-2, ANY);
    if(piecesLeft[(int)WhiteRook]) // Then supply a Rook for Q-side castling
      put(board, WhiteRook, 0, 0, ANY);
    // in variants with super-numerary Kings and Rooks, we leave these for the shuffle
  }

  if(((BOARD_RGHT-BOARD_LEFT) & 1) == 0)
    // only for even boards make effort to put pairs of colorbound pieces on opposite colors
    for(p = (int) WhiteKing; p > (int) WhitePawn; p--) {
      if(p != (int) WhiteBishop && p != (int) WhiteFerz && p != (int) WhiteAlfil) continue;
      while(piecesLeft[p] >= 2) {
        AddOnePiece(board, p, 0, LITE);
        AddOnePiece(board, p, 0, DARK);
      }
      // Odd color-bound pieces are shuffled with the rest (to not run out of paired squares)
    }

  for(p = (int) WhiteKing - 2; p > (int) WhitePawn; p--) {
    // Remaining pieces (non-colorbound, or odd color bound) can be put anywhere
    // but we leave King and Rooks for last, to possibly obey FRC restriction
    if(p == (int)WhiteRook) continue;
    while(piecesLeft[p] >= 2) AddTwoPieces(board, p, 0); // add in pairs, for not counting permutations
    if(piecesLeft[p]) AddOnePiece(board, p, 0, ANY);     // add the odd piece
  }

  // now everything is placed, except perhaps King (Unicorn) and Rooks

  if(PosFlags(0) & F_FRC_TYPE_CASTLING) {
    // Last King gets castling rights
    while(piecesLeft[(int)WhiteUnicorn]) {
      i = put(board, WhiteUnicorn, 0, piecesLeft[(int)WhiteRook]/2, ANY);
      initialRights[2]  = initialRights[5]  = board[CASTLING][2] = board[CASTLING][5] = i;
    }

    while(piecesLeft[(int)WhiteKing]) {
      i = put(board, WhiteKing, 0, piecesLeft[(int)WhiteRook]/2, ANY);
      initialRights[2]  = initialRights[5]  = board[CASTLING][2] = board[CASTLING][5] = i;
    }


  } else {
    while(piecesLeft[(int)WhiteKing])    AddOnePiece(board, WhiteKing, 0, ANY);
    while(piecesLeft[(int)WhiteUnicorn]) AddOnePiece(board, WhiteUnicorn, 0, ANY);
  }

  // Only Rooks can be left; simply place them all
  while(piecesLeft[(int)WhiteRook]) {
    i = put(board, WhiteRook, 0, 0, ANY);
    if(PosFlags(0) & F_FRC_TYPE_CASTLING) { // first and last Rook get FRC castling rights
      if(first) {
        first=0;
        initialRights[1]  = initialRights[4]  = board[CASTLING][1] = board[CASTLING][4] = i;
      }
      initialRights[0]  = initialRights[3]  = board[CASTLING][0] = board[CASTLING][3] = i;
    }
  }
  for(i=BOARD_LEFT; i<BOARD_RGHT; i++) { // copy black from white
    board[BOARD_HEIGHT-1][i] =  (int) board[0][i] < BlackPawn ? WHITE_TO_BLACK board[0][i] : EmptySquare;
  }

  if(number >= 0) appData.defaultFrcPosition %= nrOfShuffles; // normalize
}

int ptclen (const char *s, char *escapes)
{
  int n = 0;
  if(!*escapes) return strlen(s);
  while(*s) n += (*s != '/' && *s != '-' && *s != '^' && *s != '*' && !strchr(escapes, *s)) - 2*(*s == '='), s++;
  return n;
}

int SetCharTableEsc (unsigned char *table, const char * map, char * escapes)
  /* [HGM] moved here from winboard.c because of its general usefulness */
  /*       Basically a safe strcpy that uses the last character as King */
{
  int result = FALSE; int NrPieces;
  unsigned char partner[EmptySquare];

  if( map != NULL && (NrPieces=ptclen(map, escapes)) <= (int) EmptySquare
      && NrPieces >= 12 && !(NrPieces&1)) {
    int i, ii, offs, j = 0; /* [HGM] Accept even length from 12 to 88 */

    for( i=0; i<(int) EmptySquare; i++ ) table[i] = '.';
    for( i=offs=0; i<NrPieces/2-1; i++ ) {
      char *p, c=0;
      if(map[j] == '/') offs = WhitePBishop - i, j++;
      if(*escapes && (map[j] == '*' || map[j] == '-' || map[j] == '^')) c = map[j++];
      table[i+offs] = map[j++];
      if(p = strchr(escapes, map[j])) j++, table[i+offs] += 64*(p - escapes + 1);
      if(c) partner[i+offs] = table[i+offs], table[i+offs] = c;
      if(*escapes && map[j] == '=') pieceNickName[i+offs] = map[++j], j++;
    }
    table[(int) WhiteKing]  = map[j++];
    for( ii=offs=0; ii<NrPieces/2-1; ii++ ) {
      char *p, c=0;
      if(map[j] == '/') offs = WhitePBishop - ii, j++;
      i = WHITE_TO_BLACK ii;
      if(*escapes && (map[j] == '*' || map[j] == '-' || map[j] == '^')) c = map[j++];
      table[i+offs] = map[j++];
      if(p = strchr(escapes, map[j])) j++, table[i+offs] += 64*(p - escapes + 1);
      if(c) partner[i+offs] = table[i+offs], table[i+offs] = c;
      if(*escapes && map[j] == '=') pieceNickName[i+offs] = map[++j], j++;
    }
    table[(int) BlackKing]  = map[j++];


    if(*escapes) { // set up promotion pairing
      for( i=0; i<(int) EmptySquare; i++ ) promoPartner[i] = (i%BlackPawn < 11 ? i + 11 : i%BlackPawn < 22 ? i - 11 : i); // default
      // pieceToChar entirely filled, so we can look up specified partners
      for(i=0; i<EmptySquare; i++) { // adjust promotion pairing
        int c = table[i];
        if(c == '^' || c == '-') { // has specified partner
          int p;
          for(p=0; p<EmptySquare; p++) if(table[p] == partner[i]) break;
          if(c == '^') table[i] = '+';
          if(p < EmptySquare) {
            if(promoPartner[promoPartner[p]] == p) promoPartner[promoPartner[p]] = promoPartner[p]; // divorce old partners
            if(promoPartner[promoPartner[i]] == i) promoPartner[promoPartner[i]] = promoPartner[i];
            promoPartner[p] = i, promoPartner[i] = p; // and marry this couple
          }
        } else if(c == '*') {
          table[i] = partner[i];
          promoPartner[i] = (i < BlackPawn ? WhiteTokin : BlackTokin); // promotes to Tokin
        }
      }
    }

    result = TRUE;
  }

  return result;
}

int SetCharTable (unsigned char *table, const char * map)
{
  return SetCharTableEsc(table, map, "");
}

void Prelude (Board board)
{	// [HGM] superchess: random selection of exo-pieces
  int i, j, k; ChessSquare p;
  static ChessSquare exoPieces[4] = { WhiteAngel, WhiteMarshall, WhiteSilver, WhiteLance };

  GetPositionNumber(); // use FRC position number

  if(appData.pieceToCharTable != NULL) { // select pieces to participate from given char table
    SetCharTable(pieceToChar, appData.pieceToCharTable);
    for(i=(int)WhiteQueen+1, j=0; i<(int)WhiteKing && j<4; i++)
      if(PieceToChar((ChessSquare)i) != '.') exoPieces[j++] = (ChessSquare) i;
  }

  j = seed%4;		    seed /= 4;
  p = board[0][BOARD_LEFT+j];   board[0][BOARD_LEFT+j] = EmptySquare; k = PieceToNumber(p);
  board[k][BOARD_WIDTH-1] = p;  board[k][BOARD_WIDTH-2]++;
  board[BOARD_HEIGHT-1-k][0] = WHITE_TO_BLACK p;  board[BOARD_HEIGHT-1-k][1]++;
  j = seed%3 + (seed%3 >= j); seed /= 3;
  p = board[0][BOARD_LEFT+j];   board[0][BOARD_LEFT+j] = EmptySquare; k = PieceToNumber(p);
  board[k][BOARD_WIDTH-1] = p;  board[k][BOARD_WIDTH-2]++;
  board[BOARD_HEIGHT-1-k][0] = WHITE_TO_BLACK p;  board[BOARD_HEIGHT-1-k][1]++;
  j = seed%3;		    seed /= 3;
  p = board[0][BOARD_LEFT+j+5]; board[0][BOARD_LEFT+j+5] = EmptySquare; k = PieceToNumber(p);
  board[k][BOARD_WIDTH-1] = p;  board[k][BOARD_WIDTH-2]++;
  board[BOARD_HEIGHT-1-k][0] = WHITE_TO_BLACK p;  board[BOARD_HEIGHT-1-k][1]++;
  j = seed%2 + (seed%2 >= j); seed /= 2;
  p = board[0][BOARD_LEFT+j+5]; board[0][BOARD_LEFT+j+5] = EmptySquare; k = PieceToNumber(p);
  board[k][BOARD_WIDTH-1] = p;  board[k][BOARD_WIDTH-2]++;
  board[BOARD_HEIGHT-1-k][0] = WHITE_TO_BLACK p;  board[BOARD_HEIGHT-1-k][1]++;
  j = seed%4; seed /= 4; put(board, exoPieces[3],    0, j, ANY);
  j = seed%3; seed /= 3; put(board, exoPieces[2],   0, j, ANY);
  j = seed%2; seed /= 2; put(board, exoPieces[1], 0, j, ANY);
  put(board, exoPieces[0],    0, 0, ANY);
  for(i=BOARD_LEFT; i<BOARD_RGHT; i++) board[BOARD_HEIGHT-1][i] = WHITE_TO_BLACK board[0][i];
}

void InitPosition (int redraw)
{
  ChessSquare (* pieces)[BOARD_FILES];
  int i, j, pawnRow=1, pieceRows=1, overrule,
      oldx = gameInfo.boardWidth,
      oldy = gameInfo.boardHeight,
      oldh = gameInfo.holdingsWidth;
  static int oldv;

  if(appData.icsActive) shuffleOpenings = appData.fischerCastling = FALSE; // [HGM] shuffle: in ICS mode, only shuffle on ICS request

  /* [AS] Initialize pv info list [HGM] and game status */
  {
    for( i=0; i<=framePtr; i++ ) { // [HGM] vari: spare saved variations
      pvInfoList[i].depth = 0;
      boards[i][EP_STATUS] = EP_NONE;
      for( j=0; j<BOARD_FILES-2; j++ ) boards[i][CASTLING][j] = NoRights;
    }

    initialRulePlies = 0; /* 50-move counter start */

    castlingRank[0] = castlingRank[1] = castlingRank[2] = 0;
    castlingRank[3] = castlingRank[4] = castlingRank[5] = BOARD_HEIGHT-1;
  }


  /* [HGM] logic here is completely changed. In stead of full positions */
  /* the initialized data only consist of the two backranks. The switch */
  /* selects which one we will use, which is than copied to the Board   */
  /* initialPosition, which for the rest is initialized by Pawns and    */
  /* empty squares. This initial position is then copied to boards[0],  */
  /* possibly after shuffling, so that it remains available.            */

  gameInfo.holdingsWidth = 0; /* default board sizes */
  gameInfo.boardWidth    = 8;
  gameInfo.boardHeight   = 8;
  gameInfo.holdingsSize  = 0;
  nrCastlingRights = -1; /* [HGM] Kludge to indicate default should be used */
  for(i=0; i<BOARD_FILES-6; i++)
    initialPosition[CASTLING][i] = initialRights[i] = NoRights; /* but no rights yet */
  initialPosition[EP_STATUS] = EP_NONE;
  initialPosition[TOUCHED_W] = initialPosition[TOUCHED_B] = 0;
  SetCharTableEsc(pieceToChar, "PNBRQ...........Kpnbrq...........k", SUFFIXES);
  if(startVariant == gameInfo.variant) // [HGM] nicks: enable nicknames in original variant
    SetCharTable(pieceNickName, appData.pieceNickNames);
  else SetCharTable(pieceNickName, "............");
  pieces = FIDEArray;

  switch (gameInfo.variant) {
    case VariantFischeRandom:
      shuffleOpenings = TRUE;
      appData.fischerCastling = TRUE;
    default:
      break;
    case VariantShatranj:
      pieces = ShatranjArray;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PN.R.QB...Kpn.r.qb...k");
      break;
    case VariantMakruk:
      pieces = makrukArray;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PN.R.M....SKpn.r.m....sk");
      break;
    case VariantASEAN:
      pieces = aseanArray;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PN.R.Q....BKpn.r.q....bk");
      break;
    case VariantTwoKings:
      pieces = twoKingsArray;
      break;
    case VariantGrand:
      pieces = GrandArray;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PNBRQ..ACKpnbrq..ack");
      gameInfo.boardWidth = 10;
      gameInfo.boardHeight = 10;
      gameInfo.holdingsSize = 7;
      break;
    case VariantCapaRandom:
      shuffleOpenings = TRUE;
      appData.fischerCastling = TRUE;
    case VariantCapablanca:
      pieces = CapablancaArray;
      gameInfo.boardWidth = 10;
      SetCharTable(pieceToChar, "PNBRQ..ACKpnbrq..ack");
      break;
    case VariantGothic:
      pieces = GothicArray;
      gameInfo.boardWidth = 10;
      SetCharTable(pieceToChar, "PNBRQ..ACKpnbrq..ack");
      break;
    case VariantSChess:
      SetCharTable(pieceToChar, "PNBRQ..HEKpnbrq..hek");
      gameInfo.holdingsSize = 7;
      for(i=0; i<BOARD_FILES; i++) initialPosition[VIRGIN][i] = VIRGIN_W | VIRGIN_B;
      break;
    case VariantJanus:
      pieces = JanusArray;
      gameInfo.boardWidth = 10;
      SetCharTable(pieceToChar, "PNBRQ..JKpnbrq..jk");
      nrCastlingRights = 6;
      initialPosition[CASTLING][0] = initialRights[0] = BOARD_RGHT-1;
      initialPosition[CASTLING][1] = initialRights[1] = BOARD_LEFT;
      initialPosition[CASTLING][2] = initialRights[2] =(BOARD_WIDTH-1)>>1;
      initialPosition[CASTLING][3] = initialRights[3] = BOARD_RGHT-1;
      initialPosition[CASTLING][4] = initialRights[4] = BOARD_LEFT;
      initialPosition[CASTLING][5] = initialRights[5] =(BOARD_WIDTH-1)>>1;
      break;
    case VariantFalcon:
      pieces = FalconArray;
      gameInfo.boardWidth = 10;
      SetCharTable(pieceToChar, "PNBRQ............FKpnbrq............fk");
      break;
    case VariantXiangqi:
      pieces = XiangqiArray;
      gameInfo.boardWidth  = 9;
      gameInfo.boardHeight = 10;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PH.R.AE..K.C.ph.r.ae..k.c.");
      break;
    case VariantShogi:
      pieces = ShogiArray;
      gameInfo.boardWidth  = 9;
      gameInfo.boardHeight = 9;
      gameInfo.holdingsSize = 7;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PNBRLS...G.++++++Kpnbrls...g.++++++k");
      break;
    case VariantChu:
      pieces = ChuArray; pieceRows = 3;
      gameInfo.boardWidth  = 12;
      gameInfo.boardHeight = 12;
      nrCastlingRights = 0;
      //      SetCharTableEsc(pieceToChar, "P.BRQSEXOGCATHD.VMLIFN.........^T..^L......^A^H/^F^G^M.^E^X^O^I.^P.^B^R..^D^S^C^VK"
      //                                 "p.brqsexogcathd.vmlifn.........^t..^l......^a^h/^f^g^m.^e^x^o^i.^p.^b^r..^d^s^c^vk", SUFFIXES);
      SetCharTableEsc(pieceToChar, "P.BRQSEXOG...HD..^DLI^HNV........^T..^L.C...A^AFT/^F^G^M.^E^X^O^I.^P.^B^R..M^S^C^VK"
          "p.brqsexog...hd..^dli^hnv........^t..^l.c...a^aft/^f^g^m.^e^x^o^i.^p.^b^r..m^s^c^vk", SUFFIXES);
      break;
    case VariantCourier:
      pieces = CourierArray;
      gameInfo.boardWidth  = 12;
      nrCastlingRights = 0;
      SetCharTable(pieceToChar, "PNBR.FE..WMKpnbr.fe..wmk");
      break;
    case VariantKnightmate:
      pieces = KnightmateArray;
      SetCharTable(pieceToChar, "P.BRQ.....M.........K.p.brq.....m.........k.");
      break;
    case VariantSpartan:
      pieces = SpartanArray;
      SetCharTable(pieceToChar, "PNBRQ.....................K......lw......g...h......ck");
      break;
    case VariantLion:
      pieces = lionArray;
      SetCharTable(pieceToChar, "PNBRQ................LKpnbrq................lk");
      break;
    case VariantChuChess:
      pieces = ChuChessArray;
      gameInfo.boardWidth = 10;
      gameInfo.boardHeight = 10;
      SetCharTable(pieceToChar, "PNBRQ.....M.+++......LKpnbrq.....m.+++......lk");
      break;
    case VariantFairy:
      pieces = fairyArray;
      SetCharTable(pieceToChar, "PNBRQFEACWMOHIJGDVLSUKpnbrqfeacwmohijgdvlsuk");
      break;
    case VariantGreat:
      pieces = GreatArray;
      gameInfo.boardWidth = 10;
      SetCharTable(pieceToChar, "PN....E...S..HWGMKpn....e...s..hwgmk");
      gameInfo.holdingsSize = 8;
      break;
    case VariantSuper:
      pieces = FIDEArray;
      SetCharTable(pieceToChar, "PNBRQ..SE.......V.AKpnbrq..se.......v.ak");
      gameInfo.holdingsSize = 8;
      startedFromSetupPosition = TRUE;
      break;
    case VariantCrazyhouse:
    case VariantBughouse:
      pieces = FIDEArray;
      SetCharTable(pieceToChar, "PNBRQ.......~~~~Kpnbrq.......~~~~k");
      gameInfo.holdingsSize = 5;
      break;
    case VariantWildCastle:
      pieces = FIDEArray;
      /* !!?shuffle with kings guaranteed to be on d or e file */
      shuffleOpenings = 1;
      break;
    case VariantNoCastle:
      /* !!?unconstrained back-rank shuffle */
      shuffleOpenings = 1;
    case VariantSuicide:
      pieces = FIDEArray;
      nrCastlingRights = 0;
      break;
  }

  overrule = 0;
  if(appData.NrFiles >= 0) {
    if(gameInfo.boardWidth != appData.NrFiles) overrule++;
    gameInfo.boardWidth = appData.NrFiles;
  }
  if(appData.NrRanks >= 0) {
    gameInfo.boardHeight = appData.NrRanks;
  }
  if(appData.holdingsSize >= 0) {
    i = appData.holdingsSize;
    if(i > gameInfo.boardHeight) i = gameInfo.boardHeight;
    gameInfo.holdingsSize = i;
  }
  if(gameInfo.holdingsSize) gameInfo.holdingsWidth = 2;
  if(BOARD_HEIGHT > BOARD_RANKS || BOARD_WIDTH > BOARD_FILES)
    DisplayFatalError(_("Recompile to support this BOARD_RANKS or BOARD_FILES!"), 0, 2);

  pawnRow = gameInfo.boardHeight - 7; /* seems to work in all common variants */
  if(pawnRow < 1) pawnRow = 1;
  if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantASEAN ||
      gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) pawnRow = 2;
  if(gameInfo.variant == VariantChu) pawnRow = 3;

  /* User pieceToChar list overrules defaults */
  if(appData.pieceToCharTable != NULL)
    SetCharTableEsc(pieceToChar, appData.pieceToCharTable, SUFFIXES);

  for( j=0; j<BOARD_WIDTH; j++ ) { ChessSquare s = EmptySquare;

    if(j==BOARD_LEFT-1 || j==BOARD_RGHT)
      s = (ChessSquare) 0; /* account holding counts in guard band */
    for( i=0; i<BOARD_HEIGHT; i++ )
      initialPosition[i][j] = s;

    if(j < BOARD_LEFT || j >= BOARD_RGHT || overrule) continue;
    initialPosition[gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess][j] = pieces[0][j-gameInfo.holdingsWidth];
    initialPosition[pawnRow][j] = WhitePawn;
    initialPosition[BOARD_HEIGHT-pawnRow-1][j] = gameInfo.variant == VariantSpartan ? BlackLance : BlackPawn;
    if(gameInfo.variant == VariantXiangqi) {
      if(j&1) {
        initialPosition[pawnRow][j] =
          initialPosition[BOARD_HEIGHT-pawnRow-1][j] = EmptySquare;
        if(j==BOARD_LEFT+1 || j>=BOARD_RGHT-2) {
          initialPosition[2][j] = WhiteCannon;
          initialPosition[BOARD_HEIGHT-3][j] = BlackCannon;
        }
      }
    }
    if(gameInfo.variant == VariantChu) {
      if(j == (BOARD_WIDTH-2)/3 || j == BOARD_WIDTH - (BOARD_WIDTH+1)/3)
        initialPosition[pawnRow+1][j] = WhiteCobra,
          initialPosition[BOARD_HEIGHT-pawnRow-2][j] = BlackCobra;
      for(i=1; i<pieceRows; i++) {
        initialPosition[i][j] = pieces[2*i][j-gameInfo.holdingsWidth];
        initialPosition[BOARD_HEIGHT-1-i][j] =  pieces[2*i+1][j-gameInfo.holdingsWidth];
      }
    }
    if(gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) {
      if(j==BOARD_LEFT || j>=BOARD_RGHT-1) {
        initialPosition[0][j] = WhiteRook;
        initialPosition[BOARD_HEIGHT-1][j] = BlackRook;
      }
    }
    initialPosition[BOARD_HEIGHT-1-(gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess)][j] =  pieces[1][j-gameInfo.holdingsWidth];
  }
  if(gameInfo.variant == VariantChuChess) initialPosition[0][BOARD_WIDTH/2] = WhiteKing, initialPosition[BOARD_HEIGHT-1][BOARD_WIDTH/2-1] = BlackKing;
  if( (gameInfo.variant == VariantShogi) && !overrule ) {

    j=BOARD_LEFT+1;
    initialPosition[1][j] = WhiteBishop;
    initialPosition[BOARD_HEIGHT-2][j] = BlackRook;
    j=BOARD_RGHT-2;
    initialPosition[1][j] = WhiteRook;
    initialPosition[BOARD_HEIGHT-2][j] = BlackBishop;
  }

  if( nrCastlingRights == -1) {
    /* [HGM] Build normal castling rights (must be done after board sizing!) */
    /*       This sets default castling rights from none to normal corners   */
    /* Variants with other castling rights must set them themselves above    */
    nrCastlingRights = 6;

    initialPosition[CASTLING][0] = initialRights[0] = BOARD_RGHT-1;
    initialPosition[CASTLING][1] = initialRights[1] = BOARD_LEFT;
    initialPosition[CASTLING][2] = initialRights[2] = BOARD_WIDTH>>1;
    initialPosition[CASTLING][3] = initialRights[3] = BOARD_RGHT-1;
    initialPosition[CASTLING][4] = initialRights[4] = BOARD_LEFT;
    initialPosition[CASTLING][5] = initialRights[5] = BOARD_WIDTH>>1;
  }

  if(gameInfo.variant == VariantSuper) Prelude(initialPosition);
  if(gameInfo.variant == VariantGreat) { // promotion commoners
    initialPosition[PieceToNumber(WhiteMan)][BOARD_WIDTH-1] = WhiteMan;
    initialPosition[PieceToNumber(WhiteMan)][BOARD_WIDTH-2] = 9;
    initialPosition[BOARD_HEIGHT-1-PieceToNumber(WhiteMan)][0] = BlackMan;
    initialPosition[BOARD_HEIGHT-1-PieceToNumber(WhiteMan)][1] = 9;
  }
  if( gameInfo.variant == VariantSChess ) {
    initialPosition[1][0] = BlackMarshall;
    initialPosition[2][0] = BlackAngel;
    initialPosition[6][BOARD_WIDTH-1] = WhiteMarshall;
    initialPosition[5][BOARD_WIDTH-1] = WhiteAngel;
    initialPosition[1][1] = initialPosition[2][1] =
      initialPosition[6][BOARD_WIDTH-2] = initialPosition[5][BOARD_WIDTH-2] = 1;
  }
  if (appData.debugMode) {
    fprintf(debugFP, "shuffleOpenings = %d\n", shuffleOpenings);
  }
  if(shuffleOpenings) {
    SetUpShuffle(initialPosition, appData.defaultFrcPosition);
    startedFromSetupPosition = TRUE;
  }
  if(startedFromPositionFile) {
    /* [HGM] loadPos: use PositionFile for every new game */
    CopyBoard(initialPosition, filePosition);
    for(i=0; i<nrCastlingRights; i++)
      initialRights[i] = filePosition[CASTLING][i];
    startedFromSetupPosition = TRUE;
  }
  if(*appData.men) LoadPieceDesc(appData.men);

  CopyBoard(boards[0], initialPosition);

  if(oldx != gameInfo.boardWidth ||
      oldy != gameInfo.boardHeight ||
      oldv != gameInfo.variant ||
      oldh != gameInfo.holdingsWidth
    )
    InitDrawingSizes(-2 ,0);

  oldv = gameInfo.variant;
  if (redraw)
    DrawPosition(TRUE, boards[currentMove]);
}

void SendBoard (ChessProgramState *cps, int moveNum)
{
  char message[MSG_SIZ];

  if (cps->useSetboard) {
    char* fen = PositionToFEN(moveNum, cps->fenOverride, 1);
    snprintf(message, MSG_SIZ,"setboard %s\n", fen);
    SendToProgram(message, cps);
    free(fen);

  } else {
    ChessSquare *bp;
    int i, j, left=0, right=BOARD_WIDTH;
    /* Kludge to set black to move, avoiding the troublesome and now
     * deprecated "black" command.
     */
    if (!WhiteOnMove(moveNum)) // [HGM] but better a deprecated command than an illegal move...
      SendToProgram(boards[0][1][BOARD_LEFT] == WhitePawn && !pieceDesc[WhitePawn] ? "a2a3\n" : "black\nforce\n", cps);

    if(!cps->extendedEdit) left = BOARD_LEFT, right = BOARD_RGHT; // only board proper

    SendToProgram("edit\n", cps);
    SendToProgram("#\n", cps);
    for (i = BOARD_HEIGHT - 1; i >= 0; i--) {
      bp = &boards[moveNum][i][left];
      for (j = left; j < right; j++, bp++) {
        if(j == BOARD_LEFT-1 || j == BOARD_RGHT) continue;
        if ((int) *bp < (int) BlackPawn) {
          if(j == BOARD_RGHT+1)
            snprintf(message, MSG_SIZ, "%c@%d\n", PieceToChar(*bp), bp[-1]);
          else snprintf(message, MSG_SIZ, "%c%c%d\n", PieceToChar(*bp), AAA + j, ONE + i - '0');
          if(message[0] == '+' || message[0] == '~') {
            snprintf(message, MSG_SIZ,"%c%c%d+\n",
                PieceToChar((ChessSquare)(DEMOTED(*bp))),
                AAA + j, ONE + i - '0');
          }
          if(cps->alphaRank) { /* [HGM] shogi: translate coords */
            message[1] = BOARD_RGHT   - 1 - j + '1';
            message[2] = BOARD_HEIGHT - 1 - i + 'a';
          }
          SendToProgram(message, cps);
        }
      }
    }

    SendToProgram("c\n", cps);
    for (i = BOARD_HEIGHT - 1; i >= 0; i--) {
      bp = &boards[moveNum][i][left];
      for (j = left; j < right; j++, bp++) {
        if(j == BOARD_LEFT-1 || j == BOARD_RGHT) continue;
        if (((int) *bp != (int) EmptySquare)
            && ((int) *bp >= (int) BlackPawn)) {
          if(j == BOARD_LEFT-2)
            snprintf(message, MSG_SIZ, "%c@%d\n", ToUpper(PieceToChar(*bp)), bp[1]);
          else snprintf(message,MSG_SIZ, "%c%c%d\n", ToUpper(PieceToChar(*bp)),
              AAA + j, ONE + i - '0');
          if(message[0] == '+' || message[0] == '~') {
            snprintf(message, MSG_SIZ,"%c%c%d+\n",
                PieceToChar((ChessSquare)(DEMOTED(*bp))),
                AAA + j, ONE + i - '0');
          }
          if(cps->alphaRank) { /* [HGM] shogi: translate coords */
            message[1] = BOARD_RGHT   - 1 - j + '1';
            message[2] = BOARD_HEIGHT - 1 - i + 'a';
          }
          SendToProgram(message, cps);
        }
      }
    }

    SendToProgram(".\n", cps);
  }
  setboardSpoiledMachineBlack = 0; /* [HGM] assume WB 4.2.7 already solves this after sending setboard */
}

char exclusionHeader[MSG_SIZ];
int exCnt, excludePtr;
typedef struct { int ff, fr, tf, tr, pc, mark; } Exclusion;
static Exclusion excluTab[200];
static char excludeMap[(BOARD_RANKS*BOARD_FILES*BOARD_RANKS*BOARD_FILES+7)/8]; // [HGM] exclude: bitmap for excluced moves

static void WriteMap (int s)
{
  int j;
  for(j=0; j<(BOARD_RANKS*BOARD_FILES*BOARD_RANKS*BOARD_FILES+7)/8; j++) excludeMap[j] = s;
  exclusionHeader[19] = s ? '-' : '+'; // update tail state
}

static void ClearMap ()
{
  safeStrCpy(exclusionHeader, "exclude: none best +tail                                          \n", MSG_SIZ);
  excludePtr = 24; exCnt = 0;
  WriteMap(0);
}

static void UpdateExcludeHeader (int fromY, int fromX, int toY, int toX, char promoChar, char state)
{   // search given move in table of header moves, to know where it is listed (and add if not there), and update state
  char buf[2*MOVE_LEN], *p;
  Exclusion *e = excluTab;
  int i;
  for(i=0; i<exCnt; i++)
    if(e[i].ff == fromX && e[i].fr == fromY &&
        e[i].tf == toX   && e[i].tr == toY && e[i].pc == promoChar) break;
  if(i == exCnt) { // was not in exclude list; add it
    CoordsToAlgebraic(boards[currentMove], PosFlags(currentMove), fromY, fromX, toY, toX, promoChar, buf);
    if(strlen(exclusionHeader + excludePtr) < strlen(buf)) { // no space to write move
      if(state != exclusionHeader[19]) exclusionHeader[19] = '*'; // tail is now in mixed state
      return; // abort
    }
    e[i].ff = fromX; e[i].fr = fromY; e[i].tf = toX; e[i].tr = toY; e[i].pc = promoChar;
    excludePtr++; e[i].mark = excludePtr++;
    for(p=buf; *p; p++) exclusionHeader[excludePtr++] = *p; // copy move
    exCnt++;
  }
  exclusionHeader[e[i].mark] = state;
}

static int ExcludeOneMove (int fromY, int fromX, int toY, int toX, char promoChar, char state)
{   // include or exclude the given move, as specified by state ('+' or '-'), or toggle
  char buf[MSG_SIZ];
  int j, k;
  ChessMove moveType;
  if((signed char)promoChar == -1) { // kludge to indicate best move
    if(!ParseOneMove(lastPV[0], currentMove, &moveType, &fromX, &fromY, &toX, &toY, &promoChar)) // get current best move from last PV
      return 1; // if unparsable, abort
  }
  // update exclusion map (resolving toggle by consulting existing state)
  k=(BOARD_FILES*fromY+fromX)*BOARD_RANKS*BOARD_FILES + (BOARD_FILES*toY+toX);
  j = k%8; k >>= 3;
  if(state == '*') state = (excludeMap[k] & 1<<j ? '+' : '-'); // toggle
  if(state == '-' && !promoChar) // only non-promotions get marked as excluded, to allow exclusion of under-promotions
    excludeMap[k] |=   1<<j;
  else excludeMap[k] &= ~(1<<j);
  // update header
  UpdateExcludeHeader(fromY, fromX, toY, toX, promoChar, state);
  // inform engine
  snprintf(buf, MSG_SIZ, "%sclude ", state == '+' ? "in" : "ex");
  CoordsToComputerAlgebraic(fromY, fromX, toY, toX, promoChar, buf+8);
  SendToBoth(buf);
  return (state == '+');
}

static void ExcludeClick (int index)
{
  int i, j;
  Exclusion *e = excluTab;
  if(index < 25) { // none, best or tail clicked
    if(index < 13) { // none: include all
      WriteMap(0); // clear map
      for(i=0; i<exCnt; i++) exclusionHeader[excluTab[i].mark] = '+'; // and moves
      SendToBoth("include all\n"); // and inform engine
    } else if(index > 18) { // tail
      if(exclusionHeader[19] == '-') { // tail was excluded
        SendToBoth("include all\n");
        WriteMap(0); // clear map completely
        // now re-exclude selected moves
        for(i=0; i<exCnt; i++) if(exclusionHeader[e[i].mark] == '-')
          ExcludeOneMove(e[i].fr, e[i].ff, e[i].tr, e[i].tf, e[i].pc, '-');
      } else { // tail was included or in mixed state
        SendToBoth("exclude all\n");
        WriteMap(0xFF); // fill map completely
        // now re-include selected moves
        j = 0; // count them
        for(i=0; i<exCnt; i++) if(exclusionHeader[e[i].mark] == '+')
          ExcludeOneMove(e[i].fr, e[i].ff, e[i].tr, e[i].tf, e[i].pc, '+'), j++;
        if(!j) ExcludeOneMove(0, 0, 0, 0, -1, '+'); // if no moves were selected, keep best
      }
    } else { // best
      ExcludeOneMove(0, 0, 0, 0, -1, '-'); // exclude it
    }
  } else {
    for(i=0; i<exCnt; i++) if(i == exCnt-1 || excluTab[i+1].mark > index) {
      char *p=exclusionHeader + excluTab[i].mark; // do trust header more than map (promotions!)
      ExcludeOneMove(e[i].fr, e[i].ff, e[i].tr, e[i].tf, e[i].pc, *p == '+' ? '-' : '+');
      break;
    }
  }
}

ChessSquare DefaultPromoChoice (int white)
{
  ChessSquare result;
  if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
      gameInfo.variant == VariantMakruk)
    result = WhiteFerz; // no choice
  else if(gameInfo.variant == VariantASEAN)
    result = WhiteRook; // no choice
  else if(gameInfo.variant == VariantSuicide || gameInfo.variant == VariantGiveaway)
    result= WhiteKing; // in Suicide Q is the last thing we want
  else if(gameInfo.variant == VariantSpartan)
    result = white ? WhiteQueen : WhiteAngel;
  else result = WhiteQueen;
  if(!white) result = WHITE_TO_BLACK result;
  return result;
}

static int autoQueen; // [HGM] oneclick

int HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, int sweepSelect)
{
  /* [HGM] rewritten IsPromotion to only flag promotions that offer a choice */
  /* [HGM] add Shogi promotions */
  int promotionZoneSize=1, highestPromotingPiece = (int)WhitePawn;
  ChessSquare piece, partner;
  ChessMove moveType;
  Boolean premove;

  if(fromX < BOARD_LEFT || fromX >= BOARD_RGHT) return FALSE; // drop
  if(toX   < BOARD_LEFT || toX   >= BOARD_RGHT) return FALSE; // move into holdings

  if(gameMode == EditPosition || gameInfo.variant == VariantXiangqi || // no promotions
      !(fromX >=0 && fromY >= 0 && toX >= 0 && toY >= 0) ) // invalid move
    return FALSE;

  if(legal[toY][toX] == 4) return FALSE;

  piece = boards[currentMove][fromY][fromX];
  if(gameInfo.variant == VariantChu) {
    promotionZoneSize = BOARD_HEIGHT/3;
    if(legal[toY][toX] == 6) return FALSE; // no promotion if highlights deny it
    highestPromotingPiece = (PieceToChar(piece) == '+' || PieceToChar(CHUPROMOTED(piece)) != '+') ? WhitePawn : WhiteKing;
  } else if(gameInfo.variant == VariantShogi) {
    promotionZoneSize = BOARD_HEIGHT/3 +(BOARD_HEIGHT == 8);
    highestPromotingPiece = (int)WhiteAlfil;
  } else if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) {
    promotionZoneSize = 3;
  }

  // Treat Lance as Pawn when it is not representing Amazon or Lance
  if(gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu) {
    if(piece == WhiteLance) piece = WhitePawn; else
      if(piece == BlackLance) piece = BlackPawn;
  }

  // next weed out all moves that do not touch the promotion zone at all
  if((int)piece >= BlackPawn) {
    if(toY >= promotionZoneSize && fromY >= promotionZoneSize)
      return FALSE;
    if(fromY < promotionZoneSize && gameInfo.variant == VariantChuChess) return FALSE;
    highestPromotingPiece = WHITE_TO_BLACK highestPromotingPiece;
  } else {
    if(  toY < BOARD_HEIGHT - promotionZoneSize &&
        fromY < BOARD_HEIGHT - promotionZoneSize) return FALSE;
    if(fromY >= BOARD_HEIGHT - promotionZoneSize && gameInfo.variant == VariantChuChess)
      return FALSE;
  }

  if( (int)piece > highestPromotingPiece ) return FALSE; // non-promoting piece

  // weed out mandatory Shogi promotions
  if(gameInfo.variant == VariantShogi) {
    if(piece >= BlackPawn) {
      if(toY == 0 && piece == BlackPawn ||
          toY == 0 && piece == BlackQueen ||
          toY <= 1 && piece == BlackKnight) {
        *promoChoice = '+';
        return FALSE;
      }
    } else {
      if(toY == BOARD_HEIGHT-1 && piece == WhitePawn ||
          toY == BOARD_HEIGHT-1 && piece == WhiteQueen ||
          toY >= BOARD_HEIGHT-2 && piece == WhiteKnight) {
        *promoChoice = '+';
        return FALSE;
      }
    }
  }

  // weed out obviously illegal Pawn moves
  if(appData.testLegality  && (piece == WhitePawn || piece == BlackPawn) ) {
    if(toX > fromX+1 || toX < fromX-1) return FALSE; // wide
    if(piece == WhitePawn && toY != fromY+1) return FALSE; // deep
    if(piece == BlackPawn && toY != fromY-1) return FALSE; // deep
    if(fromX != toX && gameInfo.variant == VariantShogi) return FALSE;
    // note we are not allowed to test for valid (non-)capture, due to premove
  }

  // we either have a choice what to promote to, or (in Shogi) whether to promote
  if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
      gameInfo.variant == VariantMakruk) {
    ChessSquare p=BlackFerz;  // no choice
    while(p < EmptySquare) {  //but make sure we use piece that exists
      *promoChoice = PieceToChar(p++);
      if(*promoChoice != '.') break;
    }
    if(!*engineVariant) return FALSE; // if used as parent variant there might be promotion choice
  }
  // no sense asking what we must promote to if it is going to explode...
  if(gameInfo.variant == VariantAtomic && boards[currentMove][toY][toX] != EmptySquare) {
    *promoChoice = PieceToChar(BlackQueen); // Queen as good as any
    return FALSE;
  }
  // give caller the default choice even if we will not make it
  *promoChoice = ToLower(PieceToChar(defaultPromoChoice));
  partner = piece; // pieces can promote if the pieceToCharTable says so
  if(IS_SHOGI(gameInfo.variant)) *promoChoice = (defaultPromoChoice == piece && sweepSelect ? '=' : '+'); // obsolete?
  else if(Partner(&partner))     *promoChoice = (defaultPromoChoice == piece && sweepSelect ? NULLCHAR : '+');
  if(        sweepSelect && gameInfo.variant != VariantGreat
      && gameInfo.variant != VariantGrand
      && gameInfo.variant != VariantSuper) return FALSE;
  if(autoQueen) return FALSE; // predetermined

  // suppress promotion popup on illegal moves that are not premoves
  premove = gameMode == IcsPlayingWhite && !WhiteOnMove(currentMove) ||
    gameMode == IcsPlayingBlack &&  WhiteOnMove(currentMove);
  if(appData.testLegality && !premove) {
    moveType = LegalityTest(boards[currentMove], PosFlags(currentMove),
        fromY, fromX, toY, toX, IS_SHOGI(gameInfo.variant) || gameInfo.variant == VariantChuChess ? '+' : NULLCHAR);
    if(moveType == IllegalMove) *promoChoice = NULLCHAR; // could be the fact we promoted was illegal
    if(moveType != WhitePromotion && moveType  != BlackPromotion)
      return FALSE;
  }

  return TRUE;
}

int InPalace (int row, int column)
{   /* [HGM] for Xiangqi */
  if( (row < 3 || row > BOARD_HEIGHT-4) &&
      column < (BOARD_WIDTH + 4)/2 &&
      column > (BOARD_WIDTH - 5)/2 ) return TRUE;
  return FALSE;
}

int PieceForSquare (int x, int y)
{
  if (x < 0 || x >= BOARD_WIDTH || y < 0 || y >= BOARD_HEIGHT)
    return -1;
  else
    return boards[currentMove][y][x];
}

int OKToStartUserMove (int x, int y)
{
  ChessSquare from_piece;
  int white_piece;

  if (matchMode) return FALSE;
  if (gameMode == EditPosition) return TRUE;

  if (x >= 0 && y >= 0)
    from_piece = boards[currentMove][y][x];
  else
    from_piece = EmptySquare;

  if (from_piece == EmptySquare) return FALSE;

  white_piece = (int)from_piece >= (int)WhitePawn &&
    (int)from_piece < (int)BlackPawn; /* [HGM] can be > King! */

  switch (gameMode) {
    case AnalyzeFile:
    case TwoMachinesPlay:
    case EndOfGame:
      return FALSE;

    case IcsObserving:
    case IcsIdle:
      return FALSE;

    case MachinePlaysWhite:
    case IcsPlayingBlack:
      if (appData.zippyPlay) return FALSE;
      if (white_piece) {
        DisplayMoveError(_("You are playing Black"));
        return FALSE;
      }
      break;

    case MachinePlaysBlack:
    case IcsPlayingWhite:
      if (appData.zippyPlay) return FALSE;
      if (!white_piece) {
        DisplayMoveError(_("You are playing White"));
        return FALSE;
      }
      break;

    case PlayFromGameFile:
      if(!shiftKey || !appData.variations) return FALSE; // [HGM] allow starting variation in this mode
    case EditGame:
    case AnalyzeMode:
      if (!white_piece && WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is White's turn"));
        return FALSE;
      }
      if (white_piece && !WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is Black's turn"));
        return FALSE;
      }
      if (cmailMsgLoaded && (currentMove < cmailOldMove)) {
        /* Editing correspondence game history */
        /* Could disallow this or prompt for confirmation */
        cmailOldMove = -1;
      }
      break;

    case BeginningOfGame:
      if (appData.icsActive) return FALSE;
      if (!appData.noChessProgram) {
        if (!white_piece) {
          DisplayMoveError(_("You are playing White"));
          return FALSE;
        }
      }
      break;

    case Training:
      if (!white_piece && WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is White's turn"));
        return FALSE;
      }
      if (white_piece && !WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is Black's turn"));
        return FALSE;
      }
      break;

    default:
    case IcsExamining:
      break;
  }
  if (currentMove != forwardMostMove && gameMode != AnalyzeMode
      && gameMode != EditGame // [HGM] vari: treat as AnalyzeMode
      && gameMode != PlayFromGameFile // [HGM] as EditGame, with protected main line
      && gameMode != AnalyzeFile && gameMode != Training) {
    DisplayMoveError(_("Displayed position is not current"));
    return FALSE;
  }
  return TRUE;
}

Boolean OnlyMove (int *x, int *y, Boolean captures)
{
  DisambiguateClosure cl;
  if (appData.zippyPlay || !appData.testLegality) return FALSE;
  switch(gameMode) {
    case MachinePlaysBlack:
    case IcsPlayingWhite:
    case BeginningOfGame:
      if(!WhiteOnMove(currentMove)) return FALSE;
      break;
    case MachinePlaysWhite:
    case IcsPlayingBlack:
      if(WhiteOnMove(currentMove)) return FALSE;
      break;
    case EditGame:
      break;
    default:
      return FALSE;
  }
  cl.pieceIn = EmptySquare;
  cl.rfIn = *y;
  cl.ffIn = *x;
  cl.rtIn = -1;
  cl.ftIn = -1;
  cl.promoCharIn = NULLCHAR;
  Disambiguate(boards[currentMove], PosFlags(currentMove), &cl);
  if( cl.kind == NormalMove ||
      cl.kind == AmbiguousMove && captures && cl.captures == 1 ||
      cl.kind == WhitePromotion || cl.kind == BlackPromotion ||
      cl.kind == WhiteCapturesEnPassant || cl.kind == BlackCapturesEnPassant) {
    fromX = cl.ff;
    fromY = cl.rf;
    *x = cl.ft;
    *y = cl.rt;
    return TRUE;
  }
  if(cl.kind != ImpossibleMove) return FALSE;
  cl.pieceIn = EmptySquare;
  cl.rfIn = -1;
  cl.ffIn = -1;
  cl.rtIn = *y;
  cl.ftIn = *x;
  cl.promoCharIn = NULLCHAR;
  Disambiguate(boards[currentMove], PosFlags(currentMove), &cl);
  if( cl.kind == NormalMove ||
      cl.kind == AmbiguousMove && captures && cl.captures == 1 ||
      cl.kind == WhitePromotion || cl.kind == BlackPromotion ||
      cl.kind == WhiteCapturesEnPassant || cl.kind == BlackCapturesEnPassant) {
    fromX = cl.ff;
    fromY = cl.rf;
    *x = cl.ft;
    *y = cl.rt;
    autoQueen = TRUE; // act as if autoQueen on when we click to-square
    return TRUE;
  }
  return FALSE;
}

FILE *lastLoadGameFP = NULL, *lastLoadPositionFP = NULL;
int lastLoadGameNumber = 0, lastLoadPositionNumber = 0;
int lastLoadGameUseList = FALSE;
char lastLoadGameTitle[MSG_SIZ], lastLoadPositionTitle[MSG_SIZ];
ChessMove lastLoadGameStart = EndOfFile;
int doubleClick;
Boolean addToBookFlag;
static Board rightsBoard, nullBoard;

void UserMoveEvent (int fromX, int fromY, int toX, int toY, int promoChar)
{
  ChessMove moveType;
  ChessSquare pup;
  int ff=fromX, rf=fromY, ft=toX, rt=toY;

  /* Check if the user is playing in turn.  This is complicated because we
     let the user "pick up" a piece before it is his turn.  So the piece he
     tried to pick up may have been captured by the time he puts it down!
     Therefore we use the color the user is supposed to be playing in this
     test, not the color of the piece that is currently on the starting
     square---except in EditGame mode, where the user is playing both
     sides; fortunately there the capture race can't happen.  (It can
     now happen in IcsExamining mode, but that's just too bad.  The user
     will get a somewhat confusing message in that case.)
     */

  switch (gameMode) {
    case AnalyzeFile:
    case TwoMachinesPlay:
    case EndOfGame:
    case IcsObserving:
    case IcsIdle:
      /* We switched into a game mode where moves are not accepted,
         perhaps while the mouse button was down. */
      return;

    case MachinePlaysWhite:
      /* User is moving for Black */
      if (WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is White's turn"));
        return;
      }
      break;

    case MachinePlaysBlack:
      /* User is moving for White */
      if (!WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is Black's turn"));
        return;
      }
      break;

    case PlayFromGameFile:
      if(!shiftKey ||!appData.variations) return; // [HGM] only variations
    case EditGame:
    case IcsExamining:
    case BeginningOfGame:
    case AnalyzeMode:
    case Training:
      if(fromY == DROP_RANK) break; // [HGM] drop moves (entered through move type-in) are automatically assigned to side-to-move
      if ((int) boards[currentMove][fromY][fromX] >= (int) BlackPawn &&
          (int) boards[currentMove][fromY][fromX] < (int) EmptySquare) {
        /* User is moving for Black */
        if (WhiteOnMove(currentMove)) {
          DisplayMoveError(_("It is White's turn"));
          return;
        }
      } else {
        /* User is moving for White */
        if (!WhiteOnMove(currentMove)) {
          DisplayMoveError(_("It is Black's turn"));
          return;
        }
      }
      break;

    case IcsPlayingBlack:
      /* User is moving for Black */
      if (WhiteOnMove(currentMove)) {
        if (!appData.premove) {
          DisplayMoveError(_("It is White's turn"));
        } else if (toX >= 0 && toY >= 0) {
          premoveToX = toX;
          premoveToY = toY;
          premoveFromX = fromX;
          premoveFromY = fromY;
          premovePromoChar = promoChar;
          gotPremove = 1;
          if (appData.debugMode)
            fprintf(debugFP, "Got premove: fromX %d,"
                "fromY %d, toX %d, toY %d\n",
                fromX, fromY, toX, toY);
        }
        DrawPosition(TRUE, boards[currentMove]); // [HGM] repair animation damage done by premove (in particular emptying from-square)
        return;
      }
      break;

    case IcsPlayingWhite:
      /* User is moving for White */
      if (!WhiteOnMove(currentMove)) {
        if (!appData.premove) {
          DisplayMoveError(_("It is Black's turn"));
        } else if (toX >= 0 && toY >= 0) {
          premoveToX = toX;
          premoveToY = toY;
          premoveFromX = fromX;
          premoveFromY = fromY;
          premovePromoChar = promoChar;
          gotPremove = 1;
          if (appData.debugMode)
            fprintf(debugFP, "Got premove: fromX %d,"
                "fromY %d, toX %d, toY %d\n",
                fromX, fromY, toX, toY);
        }
        DrawPosition(TRUE, boards[currentMove]);
        return;
      }
      break;

    default:
      break;

    case EditPosition:
      /* EditPosition, empty square, or different color piece;
         click-click move is possible */
      if (toX == -2 || toY == -2) {
        boards[0][fromY][fromX] = (boards[0][fromY][fromX] == EmptySquare ? DarkSquare : EmptySquare);
        DrawPosition(FALSE, boards[currentMove]);
        return;
      } else if (toX >= 0 && toY >= 0) {
        if(!appData.pieceMenu && toX == fromX && toY == fromY && boards[0][rf][ff] != EmptySquare) {
          ChessSquare p = boards[0][rf][ff];
          if(PieceToChar(p) == '+') gatingPiece = CHUDEMOTED(p); else
            if(PieceToChar(CHUPROMOTED(p)) =='+') gatingPiece = CHUPROMOTED(p); else
              if(p == WhiteKing || p == BlackKing || p == WhiteRook || p == BlackRook || p == WhitePawn || p == BlackPawn) {
                int n = rightsBoard[toY][toX] ^= 1; // toggle virginity of K or R
                DisplayMessage("", n ? _("rights granted") : _("rights revoked"));
                gatingPiece = p;
              }
        } else  rightsBoard[toY][toX] = 0;  // revoke rights on moving
        boards[0][toY][toX] = boards[0][fromY][fromX];
        if(fromX == BOARD_LEFT-2) { // handle 'moves' out of holdings
          if(boards[0][fromY][0] != EmptySquare) {
            if(boards[0][fromY][1]) boards[0][fromY][1]--;
            if(boards[0][fromY][1] == 0)  boards[0][fromY][0] = EmptySquare;
          }
        } else
          if(fromX == BOARD_RGHT+1) {
            if(boards[0][fromY][BOARD_WIDTH-1] != EmptySquare) {
              if(boards[0][fromY][BOARD_WIDTH-2]) boards[0][fromY][BOARD_WIDTH-2]--;
              if(boards[0][fromY][BOARD_WIDTH-2] == 0)  boards[0][fromY][BOARD_WIDTH-1] = EmptySquare;
            }
          } else
            boards[0][fromY][fromX] = gatingPiece;
        ClearHighlights();
        DrawPosition(FALSE, boards[currentMove]);
        return;
      }
      return;
  }

  if((toX < 0 || toY < 0) && (fromY != DROP_RANK || fromX != EmptySquare)) return;
  pup = boards[currentMove][toY][toX];

  /* [HGM] If move started in holdings, it means a drop. Convert to standard form */
  if( (fromX == BOARD_LEFT-2 || fromX == BOARD_RGHT+1) && fromY != DROP_RANK ) {
    if( pup != EmptySquare ) return;
    moveType = WhiteOnMove(currentMove) ? WhiteDrop : BlackDrop;
    if(appData.debugMode) fprintf(debugFP, "Drop move %d, curr=%d, x=%d,y=%d, p=%d\n",
        moveType, currentMove, fromX, fromY, boards[currentMove][fromY][fromX]);
    // holdings might not be sent yet in ICS play; we have to figure out which piece belongs here
    if(fromX == 0) fromY = BOARD_HEIGHT-1 - fromY; // black holdings upside-down
    fromX = fromX ? WhitePawn : BlackPawn; // first piece type in selected holdings
    while(PieceToChar(fromX) == '.' || PieceToChar(fromX) == '+' || PieceToNumber(fromX) != fromY && fromX != (int) EmptySquare) fromX++;
    fromY = DROP_RANK;
  }

  /* [HGM] always test for legality, to get promotion info */
  moveType = LegalityTest(boards[currentMove], PosFlags(currentMove),
      fromY, fromX, toY, toX, promoChar);

  if(fromY == DROP_RANK && fromX == EmptySquare && (gameMode == AnalyzeMode || gameMode == EditGame || PosFlags(0) & F_NULL_MOVE)) moveType = NormalMove;

  if(moveType == IllegalMove && legal[toY][toX] > 1) moveType = NormalMove; // someone explicitly told us this move is legal

  /* [HGM] but possibly ignore an IllegalMove result */
  if (appData.testLegality) {
    if (moveType == IllegalMove || moveType == ImpossibleMove) {
      DisplayMoveError(_("Illegal move"));
      return;
    }
  }

  if(doubleClick && gameMode == AnalyzeMode) { // [HGM] exclude: move entered with double-click on from square is for exclusion, not playing
    if(ExcludeOneMove(fromY, fromX, toY, toX, promoChar, '*')) // toggle
      ClearPremoveHighlights(); // was included
    else ClearHighlights(), SetPremoveHighlights(ff, rf, ft, rt); // exclusion indicated  by premove highlights
    DrawPosition(FALSE, NULL);
    return;
  }

  if(addToBookFlag) { // adding moves to book
    char buf[MSG_SIZ], move[MSG_SIZ];
    CoordsToAlgebraic(boards[currentMove], PosFlags(currentMove), fromY, fromX, toY, toX, promoChar, move);
    if(killX >= 0) snprintf(move, MSG_SIZ, "%c%dx%c%d-%c%d%c", fromX + AAA, fromY + ONE - '0',
        killX + AAA, killY + ONE - '0', toX + AAA, toY + ONE - '0', promoChar);
    snprintf(buf, MSG_SIZ, "  0.0%%     1  %s\n", move);
    AddBookMove(buf);
    addToBookFlag = FALSE;
    ClearHighlights();
    return;
  }

  FinishMove(moveType, fromX, fromY, toX, toY, promoChar);
}

/* Common tail of UserMoveEvent and DropMenuEvent */
int FinishMove (ChessMove moveType, int fromX, int fromY, int toX, int toY, int promoChar)
{
  char *bookHit = 0;

  if((gameInfo.variant == VariantSuper || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand) && promoChar != NULLCHAR) {
    // [HGM] superchess: suppress promotions to non-available piece (but P always allowed)
    int k = PieceToNumber(CharToPiece(ToUpper(promoChar)));
    if(WhiteOnMove(currentMove)) {
      if(!boards[currentMove][k][BOARD_WIDTH-2]) return 0;
    } else {
      if(!boards[currentMove][BOARD_HEIGHT-1-k][1]) return 0;
    }
  }

  /* [HGM] <popupFix> kludge to avoid having to know the exact promotion
     move type in caller when we know the move is a legal promotion */
  if(moveType == NormalMove && promoChar)
    moveType = WhiteOnMove(currentMove) ? WhitePromotion : BlackPromotion;

  /* [HGM] <popupFix> The following if has been moved here from
     UserMoveEvent(). Because it seemed to belong here (why not allow
     piece drops in training games?), and because it can only be
     performed after it is known to what we promote. */
  if (gameMode == Training) {
    /* compare the move played on the board to the next move in the
     * game. If they match, display the move and the opponent's response.
     * If they don't match, display an error message.
     */
    int saveAnimate;
    Board testBoard;
    CopyBoard(testBoard, boards[currentMove]);
    ApplyMove(fromX, fromY, toX, toY, promoChar, testBoard);

    if (CompareBoards(testBoard, boards[currentMove+1])) {
      ForwardInner(currentMove+1);

      /* Autoplay the opponent's response.
       * if appData.animate was TRUE when Training mode was entered,
       * the response will be animated.
       */
      saveAnimate = appData.animate;
      appData.animate = animateTraining;
      ForwardInner(currentMove+1);
      appData.animate = saveAnimate;

      /* check for the end of the game */
      if (currentMove >= forwardMostMove) {
        gameMode = PlayFromGameFile;
        ModeHighlight();
        SetTrainingModeOff();
        DisplayInformation(_("End of game"));
      }
    } else {
      DisplayError(_("Incorrect move"), 0);
    }
    return 1;
  }

  /* Ok, now we know that the move is good, so we can kill
     the previous line in Analysis Mode */
  if ((gameMode == AnalyzeMode || gameMode == EditGame || gameMode == PlayFromGameFile && appData.variations && shiftKey)
      && currentMove < forwardMostMove) {
    if(appData.variations && shiftKey) PushTail(currentMove, forwardMostMove); // [HGM] vari: save tail of game
    else forwardMostMove = currentMove;
  }

  ClearMap();

  /* If we need the chess program but it's dead, restart it */
  ResurrectChessProgram();

  /* A user move restarts a paused game*/
  if (pausing)
    PauseEvent();

  thinkOutput[0] = NULLCHAR;

  MakeMove(fromX, fromY, toX, toY, promoChar); /*updates forwardMostMove*/

  if(Adjudicate(NULL)) { // [HGM] adjudicate: take care of automatic game end
    ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/
    return 1;
  }

  if (gameMode == BeginningOfGame) {
    if (appData.noChessProgram) {
      gameMode = EditGame;
      SetGameInfo();
    } else {
      char buf[MSG_SIZ];
      gameMode = MachinePlaysBlack;
      StartClocks();
      SetGameInfo();
      snprintf(buf, MSG_SIZ, "%s %s %s", gameInfo.white, _("vs."), gameInfo.black);
      DisplayTitle(buf);
      if (first.sendName) {
        snprintf(buf, MSG_SIZ,"name %s\n", gameInfo.white);
        SendToProgram(buf, &first);
      }
      StartClocks();
    }
    ModeHighlight();
  }

  /* Relay move to ICS or chess engine */
  if (appData.icsActive) {
    if (gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack ||
        gameMode == IcsExamining) {
      if(userOfferedDraw && (signed char)boards[forwardMostMove][EP_STATUS] <= EP_DRAWS) {
        SendToICS(ics_prefix); // [HGM] drawclaim: send caim and move on one line for FICS
        SendToICS("draw ");
        SendMoveToICS(moveType, fromX, fromY, toX, toY, promoChar);
      }
      // also send plain move, in case ICS does not understand atomic claims
      SendMoveToICS(moveType, fromX, fromY, toX, toY, promoChar);
      ics_user_moved = 1;
    }
  } else {
    if (first.sendTime && (gameMode == BeginningOfGame ||
          gameMode == MachinePlaysWhite ||
          gameMode == MachinePlaysBlack)) {
      SendTimeRemaining(&first, gameMode != MachinePlaysBlack);
    }
    if (gameMode != EditGame && gameMode != PlayFromGameFile && gameMode != AnalyzeMode) {
      // [HGM] book: if program might be playing, let it use book
      bookHit = SendMoveToBookUser(forwardMostMove-1, &first, FALSE);
      first.maybeThinking = TRUE;
    } else if(fromY == DROP_RANK && fromX == EmptySquare) {
      if(!first.useSetboard) SendToProgram("undo\n", &first); // kludge to change stm in engines that do not support setboard
      SendBoard(&first, currentMove+1);
      if(second.analyzing) {
        if(!second.useSetboard) SendToProgram("undo\n", &second);
        SendBoard(&second, currentMove+1);
      }
    } else {
      SendMoveToProgram(forwardMostMove-1, &first);
      if(second.analyzing) SendMoveToProgram(forwardMostMove-1, &second);
    }
    if (currentMove == cmailOldMove + 1) {
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_MOVE;
    }
  }

  ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/

  switch (gameMode) {
    case EditGame:
      if(appData.testLegality)
        switch (MateTest(boards[currentMove], PosFlags(currentMove)) ) {
          case MT_NONE:
          case MT_CHECK:
            break;
          case MT_CHECKMATE:
          case MT_STAINMATE:
            if (WhiteOnMove(currentMove)) {
              GameEnds(BlackWins, "Black mates", GE_PLAYER);
            } else {
              GameEnds(WhiteWins, "White mates", GE_PLAYER);
            }
            break;
          case MT_STALEMATE:
            GameEnds(GameIsDrawn, "Stalemate", GE_PLAYER);
            break;
        }
      break;

    case MachinePlaysBlack:
    case MachinePlaysWhite:
      /* disable certain menu options while machine is thinking */
      SetMachineThinkingEnables();
      break;

    default:
      break;
  }

  userOfferedDraw = FALSE; // [HGM] drawclaim: after move made, and tested for claimable draw
  promoDefaultAltered = FALSE; // [HGM] fall back on default choice

  if(bookHit) { // [HGM] book: simulate book reply
    static char bookMove[MSG_SIZ]; // a bit generous?

    programStats.nodes = programStats.depth = programStats.time =
      programStats.score = programStats.got_only_move = 0;
    sprintf(programStats.movelist, "%s (xbook)", bookHit);

    safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
    strcat(bookMove, bookHit);
    HandleMachineMove(bookMove, &first);
  }
  return 1;
}

void MarkByFEN(char *fen)
{
  int r, f;
  if(!appData.markers || !appData.highlightDragging) return;
  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) legal[r][f] = marker[r][f] = 0;
  r=BOARD_HEIGHT-1-deadRanks; f=BOARD_LEFT;
  while(*fen) {
    int s = 0;
    if(*fen == 'M') legal[r][f] = 2; // request promotion choice
    else if(*fen == 'B') legal[r][f] = 4; // request auto-promotion to victim
    else if(*fen >= 'A' && *fen <= 'Z') legal[r][f] = 6;
    else if(*fen >= 'a' && *fen <= 'z') *fen += 'A' - 'a';
    if(*fen == '/' && f > BOARD_LEFT) f = BOARD_LEFT, r--;
    else if(*fen == 'T') marker[r][f++] = 0;
    else if(*fen == 'Y') marker[r][f++] = 1;
    else if(*fen == 'G') marker[r][f++] = 3;
    else if(*fen == 'B') marker[r][f++] = 4;
    else if(*fen == 'C') marker[r][f++] = 5;
    else if(*fen == 'M') marker[r][f++] = 6;
    else if(*fen == 'W') marker[r][f++] = 7;
    else if(*fen == 'D') marker[r][f++] = 8;
    else if(*fen == 'R') marker[r][f++] = 2;
    else { while(*fen <= '9' && *fen >= '0') s = 10*s + *fen++ - '0';
      f += s; fen -= s>0;
    }
    while(f >= BOARD_RGHT) f -= BOARD_RGHT - BOARD_LEFT, r--;
    if(r < 0) break;
    fen++;
  }
  DrawPosition(TRUE, NULL);
}

static char baseMarker[BOARD_RANKS][BOARD_FILES], baseLegal[BOARD_RANKS][BOARD_FILES];

void Mark (Board board, int flags, ChessMove kind, int rf, int ff, int rt, int ft, VOIDSTAR closure)
{
  typedef char Markers[BOARD_RANKS][BOARD_FILES];
  Markers *m = (Markers *) closure;
  if(rf == fromY && ff == fromX && (killX < 0 ? !(rt == rf && ft == ff) && legNr & 1 :
        kill2X < 0 ? rt == killY && ft == killX || legNr & 2 : rt == killY && ft == killX || legNr & 4))
    (*m)[rt][ft] = 1 + (board[rt][ft] != EmptySquare
        || kind == WhiteCapturesEnPassant
        || kind == BlackCapturesEnPassant) + 3*(kind == FirstLeg && (killX < 0 & legNr || legNr & 2 && kill2X < 0)), legal[rt][ft] = 3;
  else if(flags & F_MANDATORY_CAPTURE && board[rt][ft] != EmptySquare) (*m)[rt][ft] = 3, legal[rt][ft] = 3;
}

static int hoverSavedValid;

void MarkTargetSquares (int clear)
{
  int x, y, sum=0;
  if(clear) { // no reason to ever suppress clearing
    for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) sum += marker[y][x], marker[y][x] = 0;
    hoverSavedValid = 0;
    if(!sum || clear < 0) return; // nothing was cleared,no redraw needed
  } else {
    int capt = 0;
    if(!appData.markers || !appData.highlightDragging || appData.icsActive && gameInfo.variant < VariantShogi ||
        !appData.testLegality && !pieceDefs || gameMode == EditPosition) return;
    GenLegal(boards[currentMove], PosFlags(currentMove), Mark, (void*) marker, EmptySquare);
    if(PosFlags(0) & F_MANDATORY_CAPTURE) {
      for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) if(marker[y][x]>1) capt++;
      if(capt)
        for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) if(marker[y][x] == 1) marker[y][x] = 0;
    }
  }
  DrawPosition(FALSE, NULL);
}

int Explode (Board board, int fromX, int fromY, int toX, int toY)
{
  if(gameInfo.variant == VariantAtomic &&
      (board[toY][toX] != EmptySquare ||                     // capture?
       toX != fromX && (board[fromY][fromX] == WhitePawn ||  // e.p. ?
         board[fromY][fromX] == BlackPawn   )
      )) {
    AnimateAtomicCapture(board, fromX, fromY, toX, toY);
    return TRUE;
  }
  return FALSE;
}

ChessSquare gatingPiece = EmptySquare; // exported to front-end, for dragging

int CanPromote (ChessSquare piece, int y)
{
  int zone = (gameInfo.variant == VariantChuChess ? 3 : 1);
  if(gameMode == EditPosition) return FALSE; // no promotions when editing position
  // some variants have fixed promotion piece, no promotion at all, or another selection mechanism
  if(IS_SHOGI(gameInfo.variant)          || gameInfo.variant == VariantXiangqi ||
      gameInfo.variant == VariantSuper    || gameInfo.variant == VariantGreat   ||
      (gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
       gameInfo.variant == VariantMakruk) && !*engineVariant) return FALSE;
  return (piece == BlackPawn && y <= zone ||
      piece == WhitePawn && y >= BOARD_HEIGHT-1-zone ||
      piece == BlackLance && y <= zone ||
      piece == WhiteLance && y >= BOARD_HEIGHT-1-zone );
}

void HoverEvent (int xPix, int yPix, int x, int y)
{
  static int oldX = -1, oldY = -1, oldFromX = -1, oldFromY = -1;
  int r, f;
  if(!first.highlight) return;
  if(fromX != oldFromX || fromY != oldFromY)  oldX = oldY = -1; // kludge to fake entry on from-click
  if(x == oldX && y == oldY) return; // only do something if we enter new square
  oldFromX = fromX; oldFromY = fromY;
  if(oldX == -1 && oldY == -1 && x == fromX && y == fromY) { // record markings after from-change
    for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
      baseMarker[r][f] = marker[r][f], baseLegal[r][f] = legal[r][f];
    hoverSavedValid = 1;
  } else if(oldX != x || oldY != y) {
    // [HGM] lift: entered new to-square; redraw arrow, and inform engine
    if(hoverSavedValid) // don't restore markers that are supposed to be cleared
      for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
        marker[r][f] = baseMarker[r][f], legal[r][f] = baseLegal[r][f];
    if((marker[y][x] == 2 || marker[y][x] == 6) && legal[y][x]) {
      char buf[MSG_SIZ];
      snprintf(buf, MSG_SIZ, "hover %c%d\n", x + AAA, y + ONE - '0');
      SendToProgram(buf, &first);
    }
    oldX = x; oldY = y;
    //	  SetHighlights(fromX, fromY, x, y);
  }
}

void ReportClick(char *action, int x, int y)
{
  char buf[MSG_SIZ]; // Inform engine of what user does
  int r, f;
  if(action[0] == 'l') // mark any target square of a lifted piece as legal to-square, clear markers
    for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
      legal[r][f] = !pieceDefs || !appData.markers, marker[r][f] = 0;
  if(!first.highlight || gameMode == EditPosition) return;
  snprintf(buf, MSG_SIZ, "%s %c%d%s\n", action, x+AAA, y+ONE-'0', controlKey && action[0]=='p' ? "," : "");
  SendToProgram(buf, &first);
}

Boolean right; // instructs front-end to use button-1 events as if they were button 3
Boolean deferChoice;

void LeftClick (ClickType clickType, int xPix, int yPix)
{
  int x, y;
  static Boolean saveAnimate;
  static int second = 0, promotionChoice = 0, clearFlag = 0, sweepSelecting = 0, flashing = 0, saveFlash;
  char promoChoice = NULLCHAR;
  ChessSquare piece;
  static TimeMark lastClickTime, prevClickTime;

  if(flashing) return;

  if(!deferChoice) { // when called for a retry, skip everything to the point where we left off
    x = EventToSquare(xPix, BOARD_WIDTH);
    y = EventToSquare(yPix, BOARD_HEIGHT);
    if (!flipView && y >= 0) {
      y = BOARD_HEIGHT - 1 - y;
    }
    if (flipView && x >= 0) {
      x = BOARD_WIDTH - 1 - x;
    }

    if(appData.monoMouse && gameMode == EditPosition && fromX < 0 && clickType == Press && boards[currentMove][y][x] == EmptySquare) {
      static int dummy;
      RightClick(clickType, xPix, yPix, &dummy, &dummy);
      right = TRUE;
      return;
    }

    if(SeekGraphClick(clickType, xPix, yPix, 0)) return;

    prevClickTime = lastClickTime; GetTimeMark(&lastClickTime);

    if (clickType == Press) ErrorPopDown();
    lastClickType = clickType, lastLeftX = xPix, lastLeftY = yPix; // [HGM] alien: remember state

    if(promoSweep != EmptySquare) { // up-click during sweep-select of promo-piece
      defaultPromoChoice = promoSweep;
      promoSweep = EmptySquare;   // terminate sweep
      promoDefaultAltered = TRUE;
      if(!selectFlag && !sweepSelecting && (x != toX || y != toY)) x = fromX, y = fromY; // and fake up-click on same square if we were still selecting
    }

    if(promotionChoice) { // we are waiting for a click to indicate promotion piece
      if(clickType == Release) return; // ignore upclick of click-click destination
      promotionChoice = FALSE; // only one chance: if click not OK it is interpreted as cancel
      if(appData.debugMode) fprintf(debugFP, "promotion click, x=%d, y=%d\n", x, y);
      if(gameInfo.holdingsWidth &&
          (WhiteOnMove(currentMove)
           ? x == BOARD_WIDTH-1 && y < gameInfo.holdingsSize && y >= 0
           : x == 0 && y >= BOARD_HEIGHT - gameInfo.holdingsSize && y < BOARD_HEIGHT) ) {
        // click in right holdings, for determining promotion piece
        ChessSquare p = boards[currentMove][y][x];
        if(appData.debugMode) fprintf(debugFP, "square contains %d\n", (int)p);
        if(p == WhitePawn || p == BlackPawn) p = EmptySquare; // [HGM] Pawns could be valid as deferral
        if(p != EmptySquare || gameInfo.variant == VariantGrand && toY != 0 && toY != BOARD_HEIGHT-1) { // [HGM] grand: empty square means defer
          FinishMove(NormalMove, fromX, fromY, toX, toY, p==EmptySquare ? NULLCHAR : ToLower(PieceToChar(p)));
          fromX = fromY = -1;
          return;
        }
      }
      DrawPosition(FALSE, boards[currentMove]);
      return;
    }

    /* [HGM] holdings: next 5 lines: ignore all clicks between board and holdings */
    if(clickType == Press
        && ( x == BOARD_LEFT-1 || x == BOARD_RGHT
          || x == BOARD_LEFT-2 && y < BOARD_HEIGHT-gameInfo.holdingsSize
          || x == BOARD_RGHT+1 && y >= gameInfo.holdingsSize) )
      return;

    if(gotPremove && x == premoveFromX && y == premoveFromY && clickType == Release) {
      // could be static click on premove from-square: abort premove
      gotPremove = 0;
      ClearPremoveHighlights();
    }

    if(clickType == Press && fromX == x && fromY == y && promoDefaultAltered && SubtractTimeMarks(&lastClickTime, &prevClickTime) >= 200)
      fromX = fromY = -1; // second click on piece after altering default promo piece treated as first click

    if(!promoDefaultAltered) { // determine default promotion piece, based on the side the user is moving for
      int side = (gameMode == IcsPlayingWhite || gameMode == MachinePlaysBlack ||
          gameMode != MachinePlaysWhite && gameMode != IcsPlayingBlack && WhiteOnMove(currentMove));
      defaultPromoChoice = DefaultPromoChoice(side);
    }

    autoQueen = appData.alwaysPromoteToQueen;

    if (fromX == -1) {
      int originalY = y;
      gatingPiece = EmptySquare;
      if (clickType != Press) {
        if(dragging) { // [HGM] from-square must have been reset due to game end since last press
          DragPieceEnd(xPix, yPix); dragging = 0;
          DrawPosition(FALSE, NULL);
        }
        return;
      }
      doubleClick = FALSE;
      if(gameMode == AnalyzeMode && (pausing || controlKey) && first.excludeMoves) { // use pause state to exclude moves
        doubleClick = TRUE; gatingPiece = boards[currentMove][y][x];
      }
      fromX = x; fromY = y; toX = toY = killX = killY = kill2X = kill2Y = -1; *promoRestrict = NULLCHAR;
      if(!appData.oneClick || !OnlyMove(&x, &y, FALSE) ||
          // even if only move, we treat as normal when this would trigger a promotion popup, to allow sweep selection
          appData.sweepSelect && CanPromote(boards[currentMove][fromY][fromX], fromY) && originalY != y) {
        /* First square */
        if (OKToStartUserMove(fromX, fromY)) {
          second = 0;
          ReportClick("lift", x, y);
          MarkTargetSquares(0);
          if(gameMode == EditPosition && controlKey) gatingPiece = boards[currentMove][fromY][fromX];
          DragPieceBegin(xPix, yPix, FALSE); dragging = 1;
          if(appData.sweepSelect && CanPromote(piece = boards[currentMove][fromY][fromX], fromY)) {
            promoSweep = defaultPromoChoice;
            selectFlag = 0; lastX = xPix; lastY = yPix; *promoRestrict = 0;
            Sweep(0); // Pawn that is going to promote: preview promotion piece
            DisplayMessage("", _("Pull pawn backwards to under-promote"));
          }
          if (appData.highlightDragging) {
            SetHighlights(fromX, fromY, -1, -1);
          } else {
            ClearHighlights();
          }
        } else fromX = fromY = -1;
        return;
      }
    }

    /* fromX != -1 */
    if (clickType == Press && gameMode != EditPosition) {
      ChessSquare fromP;
      ChessSquare toP;
      int frc;

      // ignore off-board to clicks
      if(y < 0 || x < 0) return;

      /* Check if clicking again on the same color piece */
      fromP = boards[currentMove][fromY][fromX];
      toP = boards[currentMove][y][x];
      frc = appData.fischerCastling || gameInfo.variant == VariantSChess;
      if( (killX < 0 || x != fromX || y != fromY) && // [HGM] lion: do not interpret igui as deselect!
          marker[y][x] == 0 && // if engine told we can move to here, do it even if own piece
          ((WhitePawn <= fromP && fromP <= WhiteKing &&
            WhitePawn <= toP && toP <= WhiteKing &&
            !(fromP == WhiteKing && toP == WhiteRook && frc) &&
            !(fromP == WhiteRook && toP == WhiteKing && frc)) ||
           (BlackPawn <= fromP && fromP <= BlackKing &&
            BlackPawn <= toP && toP <= BlackKing &&
            !(fromP == BlackRook && toP == BlackKing && frc) && // allow also RxK as FRC castling
            !(fromP == BlackKing && toP == BlackRook && frc)))) {
        /* Clicked again on same color piece -- changed his mind */
        second = (x == fromX && y == fromY);
        killX = killY = kill2X = kill2Y = -1; *promoRestrict = NULLCHAR;
        if(second && gameMode == AnalyzeMode && SubtractTimeMarks(&lastClickTime, &prevClickTime) < 200) {
          second = FALSE; // first double-click rather than scond click
          doubleClick = first.excludeMoves; // used by UserMoveEvent to recognize exclude moves
        }
        promoDefaultAltered = FALSE;
        if(!second) MarkTargetSquares(1);
        if(!(second && appData.oneClick && OnlyMove(&x, &y, TRUE))) {
          if (appData.highlightDragging) {
            SetHighlights(x, y, -1, -1);
          } else {
            ClearHighlights();
          }
          if (OKToStartUserMove(x, y)) {
            if(gameInfo.variant == VariantSChess && // S-Chess: back-rank piece selected after holdings means gating
                (fromX == BOARD_LEFT-2 || fromX == BOARD_RGHT+1) &&
                y == (toP < BlackPawn ? 0 : BOARD_HEIGHT-1))
              gatingPiece = boards[currentMove][fromY][fromX];
            else gatingPiece = doubleClick ? fromP : EmptySquare;
            fromX = x;
            fromY = y; dragging = 1;
            if(!second) ReportClick("lift", x, y);
            MarkTargetSquares(0);
            DragPieceBegin(xPix, yPix, FALSE);
            if(appData.sweepSelect && CanPromote(piece = boards[currentMove][y][x], y)) {
              promoSweep = defaultPromoChoice;
              selectFlag = 0; lastX = xPix; lastY = yPix; *promoRestrict = 0;
              Sweep(0); // Pawn that is going to promote: preview promotion piece
            }
          }
        }
        if(x == fromX && y == fromY) return; // if OnlyMove altered (x,y) we go on
        second = FALSE;
      }
      // ignore clicks on holdings
      if(x < BOARD_LEFT || x >= BOARD_RGHT) return;
    }

    if(x == fromX && y == fromY && clickType == Press && gameMode == EditPosition && SubtractTimeMarks(&lastClickTime, &prevClickTime) < 200) {
      gatingPiece = boards[currentMove][fromY][fromX]; // prepare to copy rather than move
      DragPieceBegin(xPix, yPix, FALSE); dragging = 1;
      return;
    }

    if (clickType == Release && x == fromX && y == fromY && killX < 0 && !sweepSelecting) {
      DragPieceEnd(xPix, yPix); dragging = 0;
      if(clearFlag) {
        // a deferred attempt to click-click move an empty square on top of a piece
        boards[currentMove][y][x] = EmptySquare;
        ClearHighlights();
        DrawPosition(FALSE, boards[currentMove]);
        fromX = fromY = -1; clearFlag = 0;
        return;
      }
      if (appData.animateDragging) {
        /* Undo animation damage if any */
        DrawPosition(FALSE, NULL);
      }
      if (second) {
        /* Second up/down in same square; just abort move */
        second = 0;
        fromX = fromY = -1;
        gatingPiece = EmptySquare;
        ClearHighlights();
        gotPremove = 0;
        ClearPremoveHighlights();
        MarkTargetSquares(-1);
        DrawPosition(FALSE, NULL); // make user highlights are drawn (and deferred marker clearing)
      } else {
        /* First upclick in same square; start click-click mode */
        SetHighlights(x, y, -1, -1);
      }
      return;
    }

    clearFlag = 0;

    if(gameMode != EditPosition && !appData.testLegality && !legal[y][x] &&
        fromX >= BOARD_LEFT && fromX < BOARD_RGHT && (x != killX || y != killY) && !sweepSelecting) {
      if(dragging) DragPieceEnd(xPix, yPix), dragging = 0;
      DisplayMessage(_("only marked squares are legal"),"");
      DrawPosition(TRUE, NULL);
      return; // ignore to-click
    }

    /* we now have a different from- and (possibly off-board) to-square */
    /* Completed move */
    if(!sweepSelecting) {
      toX = x;
      toY = y;
    }

    piece = boards[currentMove][fromY][fromX];

    saveAnimate = appData.animate;
    if (clickType == Press) {
      if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
      if(gameMode == EditPosition && boards[currentMove][fromY][fromX] == EmptySquare) {
        // must be Edit Position mode with empty-square selected
        fromX = x; fromY = y; DragPieceBegin(xPix, yPix, FALSE); dragging = 1; // consider this a new attempt to drag
        if(x >= BOARD_LEFT && x < BOARD_RGHT) clearFlag = 1; // and defer click-click move of empty-square to up-click
        return;
      }
      if(dragging == 2) {  // [HGM] lion: just turn buttonless drag into normal drag, and let release to the job
        return;
      }
      if(x == killX && y == killY) {              // second click on this square, which was selected as first-leg target
        killX = kill2X; killY = kill2Y; kill2X = kill2Y = -1;   // this informs us no second leg is coming, so treat as to-click without intermediate
      } else
        if(marker[y][x] == 5) return; // [HGM] lion: to-click on cyan square; defer action to release
      if(legal[y][x] == 2 || HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, FALSE)) {
        if(appData.sweepSelect) {
          promoSweep = defaultPromoChoice;
          if(gameInfo.variant != VariantChuChess && PieceToChar(CHUPROMOTED(piece)) == '+') promoSweep = CHUPROMOTED(piece);
          selectFlag = 0; lastX = xPix; lastY = yPix;
          ReportClick("put", x, y); // extra put to prompt engine for 'choice' command
          saveFlash = appData.flashCount; appData.flashCount = 0;
          Sweep(0); // Pawn that is going to promote: preview promotion piece
          sweepSelecting = 1;
          DisplayMessage("", _("Pull pawn backwards to under-promote"));
          MarkTargetSquares(1);
        }
        return; // promo popup appears on up-click
      }
      /* Finish clickclick move */
      if (appData.animate || appData.highlightLastMove) {
        SetHighlights(fromX, fromY, toX, toY);
      } else {
        ClearHighlights();
      }
      MarkTargetSquares(1);
    } else if(sweepSelecting) { // this must be the up-click corresponding to the down-click that started the sweep
      sweepSelecting = 0; appData.animate = FALSE; // do not animate, a selected piece already on to-square
      *promoRestrict = 0; appData.flashCount = saveFlash;
      if (appData.animate || appData.highlightLastMove) {
        SetHighlights(fromX, fromY, toX, toY);
      } else {
        ClearHighlights();
      }
      MarkTargetSquares(1);
    } else {
#if 0
      // [HGM] this must be done after the move is made, as with arrow it could lead to a board redraw with piece still on from square
      /* Finish drag move */
      if (appData.highlightLastMove) {
        SetHighlights(fromX, fromY, toX, toY);
      } else {
        ClearHighlights();
      }
#endif
      if(PieceToChar(CHUPROMOTED(boards[currentMove][fromY][fromX])) == '+')
        defaultPromoChoice = CHUPROMOTED(boards[currentMove][fromY][fromX]);
      if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
      if(marker[y][x] == 5) { // [HGM] lion: this was the release of a to-click or drag on a cyan square
        dragging *= 2;            // flag button-less dragging if we are dragging
        MarkTargetSquares(1);
        if(x == killX && y == killY) killX = kill2X, killY = kill2Y, kill2X = kill2Y = -1; // cancel last kill
        else {
          kill2X = killX; kill2Y = killY;
          killX = x; killY = y;     // remember this square as intermediate
          ReportClick("put", x, y); // and inform engine
          ReportClick("lift", x, y);
          MarkTargetSquares(0);
          return;
        }
      }
      DragPieceEnd(xPix, yPix); dragging = 0;
      /* Don't animate move and drag both */
      appData.animate = FALSE;
      MarkTargetSquares(-1); // -1 defers displaying marker change to prevent piece reappearing on from-square!
    }

    // moves into holding are invalid for now (except in EditPosition, adapting to-square)
    if(x >= 0 && x < BOARD_LEFT || x >= BOARD_RGHT) {
      ChessSquare piece = boards[currentMove][fromY][fromX];
      if(gameMode == EditPosition && piece != EmptySquare &&
          fromX >= BOARD_LEFT && fromX < BOARD_RGHT) {
        int n;

        if(x == BOARD_LEFT-2 && piece >= BlackPawn) {
          n = PieceToNumber(piece - (int)BlackPawn);
          if(n >= gameInfo.holdingsSize) { n = 0; piece = BlackPawn; }
          boards[currentMove][BOARD_HEIGHT-1 - n][0] = piece;
          boards[currentMove][BOARD_HEIGHT-1 - n][1]++;
        } else
          if(x == BOARD_RGHT+1 && piece < BlackPawn) {
            n = PieceToNumber(piece);
            if(n >= gameInfo.holdingsSize) { n = 0; piece = WhitePawn; }
            boards[currentMove][n][BOARD_WIDTH-1] = piece;
            boards[currentMove][n][BOARD_WIDTH-2]++;
          }
        boards[currentMove][fromY][fromX] = EmptySquare;
      }
      ClearHighlights();
      fromX = fromY = -1;
      MarkTargetSquares(1);
      DrawPosition(TRUE, boards[currentMove]);
      return;
    }

    // off-board moves should not be highlighted
    if(x < 0 || y < 0) {
      ClearHighlights();
      DrawPosition(FALSE, NULL);
    } else ReportClick("put", x, y);

    if(gatingPiece != EmptySquare && gameInfo.variant == VariantSChess) promoChoice = ToLower(PieceToChar(gatingPiece));
  }

  if(legal[toY][toX] == 2) { // highlight-induced promotion
    if(piece == defaultPromoChoice) promoChoice = NULLCHAR; // deferral
    else promoChoice = ToLower(PieceToChar(defaultPromoChoice));
  } else if(legal[toY][toX] == 4) { // blue target square: engine must supply promotion choice
    if(!*promoRestrict) {           // but has not done that yet
      deferChoice = TRUE;           // set up retry for when it does
      return;                       // and wait for that
    }
    promoChoice = ToLower(*promoRestrict); // force engine's choice
    deferChoice = FALSE;
  }

  if (legal[toY][toX] == 2 && !appData.sweepSelect || HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, appData.sweepSelect)) {
    SetHighlights(fromX, fromY, toX, toY);
    MarkTargetSquares(1);
    if(gameInfo.variant == VariantSuper || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand) {
      // [HGM] super: promotion to captured piece selected from holdings
      ChessSquare p = boards[currentMove][fromY][fromX], q = boards[currentMove][toY][toX];
      promotionChoice = TRUE;
      // kludge follows to temporarily execute move on display, without promoting yet
      boards[currentMove][fromY][fromX] = EmptySquare; // move Pawn to 8th rank
      boards[currentMove][toY][toX] = p;
      DrawPosition(FALSE, boards[currentMove]);
      boards[currentMove][fromY][fromX] = p; // take back, but display stays
      boards[currentMove][toY][toX] = q;
      DisplayMessage("Click in holdings to choose piece", "");
      return;
    }
    DrawPosition(FALSE, NULL); // shows piece on from-square during promo popup
    PromotionPopUp(promoChoice);
  } else {
    int oldMove = currentMove;
    flashing = 1; // prevent recursive calling (by release of to-click) while flashing piece
    UserMoveEvent(fromX, fromY, toX, toY, promoChoice);
    if (!appData.highlightLastMove || gotPremove) ClearHighlights();
    if (gotPremove) SetPremoveHighlights(fromX, fromY, toX, toY), DrawPosition(FALSE, NULL);
    if(saveAnimate && !appData.animate && currentMove != oldMove && // drag-move was performed
        Explode(boards[currentMove-1], fromX, fromY, toX, toY))
      DrawPosition(TRUE, boards[currentMove]);
    else DrawPosition(FALSE, NULL);
    fromX = fromY = -1;
    flashing = 0;
  }
  appData.animate = saveAnimate;
  if (appData.animate || appData.animateDragging) {
    /* Undo animation damage if needed */
    //	DrawPosition(FALSE, NULL);
  }
}

int RightClick (ClickType action, int x, int y, int *fromX, int *fromY)
{   // front-end-free part taken out of PieceMenuPopup
  int whichMenu; int xSqr, ySqr;

  if(seekGraphUp) { // [HGM] seekgraph
    if(action == Press)   SeekGraphClick(Press, x, y, 2); // 2 indicates right-click: no pop-down on miss
    if(action == Release) SeekGraphClick(Release, x, y, 2); // and no challenge on hit
    return -2;
  }

  if((gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack)
      && !appData.zippyPlay && appData.bgObserve) { // [HGM] bughouse: show background game
    if(!partnerBoardValid) return -2; // suppress display of uninitialized boards
    if( appData.dualBoard) return -2; // [HGM] dual: is already displayed
    if(action == Press)   {
      originalFlip = flipView;
      flipView = !flipView; // temporarily flip board to see game from partners perspective
      DrawPosition(TRUE, partnerBoard);
      DisplayMessage(partnerStatus, "");
      partnerUp = TRUE;
    } else if(action == Release) {
      flipView = originalFlip;
      DrawPosition(TRUE, boards[currentMove]);
      partnerUp = FALSE;
    }
    return -2;
  }

  xSqr = EventToSquare(x, BOARD_WIDTH);
  ySqr = EventToSquare(y, BOARD_HEIGHT);
  if (action == Release) {
    if(pieceSweep != EmptySquare) {
      EditPositionMenuEvent(pieceSweep, toX, toY);
      pieceSweep = EmptySquare;
    } else UnLoadPV(); // [HGM] pv
  }
  if (action != Press) return -2; // return code to be ignored
  switch (gameMode) {
    case IcsExamining:
      if(xSqr < BOARD_LEFT || xSqr >= BOARD_RGHT) return -1;
    case EditPosition:
      if (xSqr == BOARD_LEFT-1 || xSqr == BOARD_RGHT) return -1;
      if (xSqr < 0 || ySqr < 0) return -1;
      if(appData.pieceMenu) { whichMenu = 0; break; } // edit-position menu
      pieceSweep = shiftKey ? BlackPawn : WhitePawn;  // [HGM] sweep: prepare selecting piece by mouse sweep
      toX = xSqr; toY = ySqr; lastX = x, lastY = y;
      if(flipView) toX = BOARD_WIDTH - 1 - toX; else toY = BOARD_HEIGHT - 1 - toY;
      NextPiece(0);
      return 2; // grab
    case IcsObserving:
      if(!appData.icsEngineAnalyze) return -1;
    case IcsPlayingWhite:
    case IcsPlayingBlack:
      if(!appData.zippyPlay) goto noZip;
    case AnalyzeMode:
    case AnalyzeFile:
    case MachinePlaysWhite:
    case MachinePlaysBlack:
    case TwoMachinesPlay: // [HGM] pv: use for showing PV
      if (!appData.dropMenu) {
        LoadPV(x, y);
        return 2; // flag front-end to grab mouse events
      }
      if(gameMode == TwoMachinesPlay || gameMode == AnalyzeMode ||
          gameMode == AnalyzeFile || gameMode == IcsObserving) return -1;
    case EditGame:
noZip:
      if (xSqr < 0 || ySqr < 0) return -1;
      if (!appData.dropMenu || appData.testLegality &&
          gameInfo.variant != VariantBughouse &&
          gameInfo.variant != VariantCrazyhouse) return -1;
      whichMenu = 1; // drop menu
      break;
    default:
      return -1;
  }

  if (((*fromX = xSqr) < 0) ||
      ((*fromY = ySqr) < 0)) {
    *fromX = *fromY = -1;
    return -1;
  }
  if (flipView)
    *fromX = BOARD_WIDTH - 1 - *fromX;
  else
    *fromY = BOARD_HEIGHT - 1 - *fromY;

  return whichMenu;
}

void Wheel (int dir, int x, int y)
{
  if(gameMode == EditPosition) {
    int xSqr = EventToSquare(x, BOARD_WIDTH);
    int ySqr = EventToSquare(y, BOARD_HEIGHT);
    if(ySqr < 0 || xSqr < BOARD_LEFT || xSqr >= BOARD_RGHT) return;
    if(flipView) xSqr = BOARD_WIDTH - 1 - xSqr; else ySqr = BOARD_HEIGHT - 1 - ySqr;
    do {
      boards[currentMove][ySqr][xSqr] += dir;
      if((int) boards[currentMove][ySqr][xSqr] < WhitePawn) boards[currentMove][ySqr][xSqr] = BlackKing;
      if((int) boards[currentMove][ySqr][xSqr] > BlackKing) boards[currentMove][ySqr][xSqr] = WhitePawn;
    } while(PieceToChar(boards[currentMove][ySqr][xSqr]) == '.');
    DrawPosition(FALSE, boards[currentMove]);
  } else if(dir > 0) ForwardEvent(); else BackwardEvent();
}

void SendProgramStatsToFrontend (ChessProgramState * cps, ChessProgramStats * cpstats)
{
  //    char * hint = lastHint;
  FrontEndProgramStats stats;

  stats.which = cps == &first ? 0 : 1;
  stats.depth = cpstats->depth;
  stats.nodes = cpstats->nodes;
  stats.score = cpstats->score;
  stats.time = cpstats->time;
  stats.pv = cpstats->movelist;
  stats.hint = lastHint;
  stats.an_move_index = 0;
  stats.an_move_count = 0;

  if( gameMode == AnalyzeMode || gameMode == AnalyzeFile ) {
    stats.hint = cpstats->move_name;
    stats.an_move_index = cpstats->nr_moves - cpstats->moves_left;
    stats.an_move_count = cpstats->nr_moves;
  }

  if(stats.pv && stats.pv[0]) safeStrCpy(lastPV[stats.which], stats.pv, sizeof(lastPV[stats.which])/sizeof(lastPV[stats.which][0])); // [HGM] pv: remember last PV of each

  if( gameMode == AnalyzeMode && stats.pv && stats.pv[0]
      && appData.analysisBell && stats.time >= 100*appData.analysisBell ) RingBell();

  SetProgramStats( &stats );
}

void ClearEngineOutputPane (int which)
{
  static FrontEndProgramStats dummyStats;
  dummyStats.which = which;
  dummyStats.pv = "#";
  SetProgramStats( &dummyStats );
}

#define MAXPLAYERS 500

char *TourneyStandings (int display)
{
  int i, w, b, color, wScore, bScore, dummy, nr=0, nPlayers=0;
  int score[MAXPLAYERS], ranking[MAXPLAYERS], points[MAXPLAYERS], games[MAXPLAYERS];
  char result, *p, *names[MAXPLAYERS];

  if(appData.tourneyType < 0 && !strchr(appData.results, '*'))
    return strdup(_("Swiss tourney finished")); // standings of Swiss yet TODO
  names[0] = p = strdup(appData.participants);
  while(p = strchr(p, '\n')) *p++ = NULLCHAR, names[++nPlayers] = p; // count participants

  for(i=0; i<nPlayers; i++) score[i] = games[i] = 0;

  while(result = appData.results[nr]) {
    color = Pairing(nr, nPlayers, &w, &b, &dummy);
    if(!(color ^ matchGame & 1)) { dummy = w; w = b; b = dummy; }
    wScore = bScore = 0;
    switch(result) {
      case '+': wScore = 2; break;
      case '-': bScore = 2; break;
      case '=': wScore = bScore = 1; break;
      case ' ':
      case '*': return strdup("busy"); // tourney not finished
    }
    score[w] += wScore;
    score[b] += bScore;
    games[w]++;
    games[b]++;
    nr++;
  }
  if(appData.tourneyType > 0) nPlayers = appData.tourneyType; // in gauntlet, list only gauntlet engine(s)
  for(w=0; w<nPlayers; w++) {
    bScore = -1;
    for(i=0; i<nPlayers; i++) if(score[i] > bScore) bScore = score[i], b = i;
    ranking[w] = b; points[w] = bScore; score[b] = -2;
  }
  p = malloc(nPlayers*34+1);
  for(w=0; w<nPlayers && w<display; w++)
    sprintf(p+34*w, "%2d. %5.1f/%-3d %-19.19s\n", w+1, points[w]/2., games[ranking[w]], names[ranking[w]]);
  free(names[0]);
  return p;
}

void Count (Board board, int pCnt[], int *nW, int *nB, int *wStale, int *bStale, int *bishopColor)
{	// count all piece types
  int p, f, r;
  *nB = *nW = *wStale = *bStale = *bishopColor = 0;
  for(p=WhitePawn; p<=EmptySquare; p++) pCnt[p] = 0;
  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
    p = board[r][f];
    pCnt[p]++;
    if(p == WhitePawn && r == BOARD_HEIGHT-1) (*wStale)++; else
      if(p == BlackPawn && r == 0) (*bStale)++; // count last-Rank Pawns (XQ) separately
    if(p <= WhiteKing) (*nW)++; else if(p <= BlackKing) (*nB)++;
    if(p == WhiteBishop || p == WhiteFerz || p == WhiteAlfil ||
        p == BlackBishop || p == BlackFerz || p == BlackAlfil   )
      *bishopColor |= 1 << ((f^r)&1); // track square color of color-bound pieces
  }
}

int SufficientDefence (int pCnt[], int side, int nMine, int nHis)
{
  int myPawns = pCnt[WhitePawn+side]; // my total Pawn count;
  int majorDefense = pCnt[BlackRook-side] + pCnt[BlackCannon-side] + pCnt[BlackKnight-side];

  nMine -= pCnt[WhiteFerz+side] + pCnt[WhiteAlfil+side]; // discount defenders
  if(nMine - myPawns > 2) return FALSE; // no trivial draws with more than 1 major
  if(myPawns == 2 && nMine == 3) // KPP
    return majorDefense || pCnt[BlackFerz-side] + pCnt[BlackAlfil-side] >= 3;
  if(myPawns == 1 && nMine == 2) // KP
    return majorDefense || pCnt[BlackFerz-side] + pCnt[BlackAlfil-side]  + pCnt[BlackPawn-side] >= 1;
  if(myPawns == 1 && nMine == 3 && pCnt[WhiteKnight+side]) // KHP
    return majorDefense || pCnt[BlackFerz-side] + pCnt[BlackAlfil-side]*2 >= 5;
  if(myPawns) return FALSE;
  if(pCnt[WhiteRook+side])
    return pCnt[BlackRook-side] ||
      pCnt[BlackCannon-side] && (pCnt[BlackFerz-side] >= 2 || pCnt[BlackAlfil-side] >= 2) ||
      pCnt[BlackKnight-side] && pCnt[BlackFerz-side] + pCnt[BlackAlfil-side] > 2 ||
      pCnt[BlackFerz-side] + pCnt[BlackAlfil-side] >= 4;
  if(pCnt[WhiteCannon+side]) {
    if(pCnt[WhiteFerz+side] + myPawns == 0) return TRUE; // Cannon needs platform
    return majorDefense || pCnt[BlackAlfil-side] >= 2;
  }
  if(pCnt[WhiteKnight+side])
    return majorDefense || pCnt[BlackFerz-side] >= 2 || pCnt[BlackAlfil-side] + pCnt[BlackPawn-side] >= 1;
  return FALSE;
}

int MatingPotential (int pCnt[], int side, int nMine, int nHis, int stale, int bisColor)
{
  VariantClass v = gameInfo.variant;

  if(v == VariantShogi || v == VariantCrazyhouse || v == VariantBughouse) return TRUE; // drop games always winnable
  if(v == VariantShatranj) return TRUE; // always winnable through baring
  if(v == VariantLosers || v == VariantSuicide || v == VariantGiveaway) return TRUE;
  if(v == Variant3Check || v == VariantAtomic) return nMine > 1; // can win through checking / exploding King

  if(v == VariantXiangqi) {
    int majors = 5*pCnt[BlackKnight-side] + 7*pCnt[BlackCannon-side] + 7*pCnt[BlackRook-side];

    nMine -= pCnt[WhiteFerz+side] + pCnt[WhiteAlfil+side] + stale; // discount defensive pieces and back-rank Pawns
    if(nMine + stale == 1) return (pCnt[BlackFerz-side] > 1 && pCnt[BlackKnight-side] > 0); // bare K can stalemate KHAA (!)
    if(nMine > 2) return TRUE; // if we don't have P, H or R, we must have CC
    if(nMine == 2 && pCnt[WhiteCannon+side] == 0) return TRUE; // We have at least one P, H or R
    // if we get here, we must have KC... or KP..., possibly with additional A, E or last-rank P
    if(stale) // we have at least one last-rank P plus perhaps C
      return majors // KPKX
        || pCnt[BlackFerz-side] && pCnt[BlackFerz-side] + pCnt[WhiteCannon+side] + stale > 2; // KPKAA, KPPKA and KCPKA
    else // KCA*E*
      return pCnt[WhiteFerz+side] // KCAK
        || pCnt[WhiteAlfil+side] && pCnt[BlackRook-side] + pCnt[BlackCannon-side] + pCnt[BlackFerz-side] // KCEKA, KCEKX (X!=H)
        || majors + (12*pCnt[BlackFerz-side] | 6*pCnt[BlackAlfil-side]) > 16; // KCKAA, KCKAX, KCKEEX, KCKEXX (XX!=HH), KCKXXX
    // TO DO: cases wih an unpromoted f-Pawn acting as platform for an opponent Cannon

  } else if(v == VariantKnightmate) {
    if(nMine == 1) return FALSE;
    if(nMine == 2 && nHis == 1 && pCnt[WhiteBishop+side] + pCnt[WhiteFerz+side] + pCnt[WhiteKnight+side]) return FALSE; // KBK is only draw
  } else if(pCnt[WhiteKing] == 1 && pCnt[BlackKing] == 1) { // other variants with orthodox Kings
    int nBishops = pCnt[WhiteBishop+side] + pCnt[WhiteFerz+side];

    if(nMine == 1) return FALSE; // bare King
    if(nBishops && bisColor == 3) return TRUE; // There must be a second B/A/F, which can either block (his) or attack (mine) the escape square
    nMine += (nBishops > 0) - nBishops; // By now all Bishops (and Ferz) on like-colored squares, so count as one
    if(nMine > 2 && nMine != pCnt[WhiteAlfil+side] + 1) return TRUE; // At least two pieces, not all Alfils
    // by now we have King + 1 piece (or multiple Bishops on the same color)
    if(pCnt[WhiteKnight+side])
      return (pCnt[BlackKnight-side] + pCnt[BlackBishop-side] + pCnt[BlackMan-side] +
          pCnt[BlackWazir-side] + pCnt[BlackSilver-side] + bisColor // KNKN, KNKB, KNKF, KNKE, KNKW, KNKM, KNKS
          || nHis > 3); // be sure to cover suffocation mates in corner (e.g. KNKQCA)
    if(nBishops)
      return (pCnt[BlackKnight-side]); // KBKN, KFKN
    if(pCnt[WhiteAlfil+side])
      return (nHis > 2); // Alfils can in general not reach a corner square, but there might be edge (suffocation) mates
    if(pCnt[WhiteWazir+side])
      return (pCnt[BlackKnight-side] + pCnt[BlackWazir-side] + pCnt[BlackAlfil-side]); // KWKN, KWKW, KWKE
  }

  return TRUE;
}

int CompareWithRights (Board b1, Board b2)
{
  int rights = 0;
  if(!CompareBoards(b1, b2)) return FALSE;
  if(b1[EP_STATUS] != b2[EP_STATUS]) return FALSE;
  /* compare castling rights */
  if( b1[CASTLING][2] != b2[CASTLING][2] && (b2[CASTLING][0] != NoRights || b2[CASTLING][1] != NoRights) )
    rights++; /* King lost rights, while rook still had them */
  if( b1[CASTLING][2] != NoRights ) { /* king has rights */
    if( b1[CASTLING][0] != b2[CASTLING][0] || b1[CASTLING][1] != b2[CASTLING][1] )
      rights++; /* but at least one rook lost them */
  }
  if( b1[CASTLING][5] != b1[CASTLING][5] && (b2[CASTLING][3] != NoRights || b2[CASTLING][4] != NoRights) )
    rights++;
  if( b1[CASTLING][5] != NoRights ) {
    if( b1[CASTLING][3] != b2[CASTLING][3] || b1[CASTLING][4] != b2[CASTLING][4] )
      rights++;
  }
  return rights == 0;
}

int Adjudicate (ChessProgramState *cps)
{	// [HGM] some adjudications useful with buggy engines
  // [HGM] adjudicate: made into separate routine, which now can be called after every move
  //       In any case it determnes if the game is a claimable draw (filling in EP_STATUS).
  //       Actually ending the game is now based on the additional internal condition canAdjudicate.
  //       Only when the game is ended, and the opponent is a computer, this opponent gets the move relayed.
  int k, drop, count = 0; static int bare = 1;
  ChessProgramState *engineOpponent = (gameMode == TwoMachinesPlay ? cps->other : (cps ? NULL : &first));
  Boolean canAdjudicate = !appData.icsActive;

  // most tests only when we understand the game, i.e. legality-checking on
  if( appData.testLegality )
  {   /* [HGM] Some more adjudications for obstinate engines */
    int nrW, nrB, bishopColor, staleW, staleB, nr[EmptySquare+2], i;
    static int moveCount = 6;
    ChessMove result;
    char *reason = NULL;

    /* Count what is on board. */
    Count(boards[forwardMostMove], nr, &nrW, &nrB, &staleW, &staleB, &bishopColor);

    /* Some material-based adjudications that have to be made before stalemate test */
    if(gameInfo.variant == VariantAtomic && nr[WhiteKing] + nr[BlackKing] < 2) {
      // [HGM] atomic: stm must have lost his King on previous move, as destroying own K is illegal
      boards[forwardMostMove][EP_STATUS] = EP_CHECKMATE; // make claimable as if stm is checkmated
      if(canAdjudicate && appData.checkMates) {
        if(engineOpponent)
          SendMoveToProgram(forwardMostMove-1, engineOpponent); // make sure opponent gets move
        GameEnds( WhiteOnMove(forwardMostMove) ? BlackWins : WhiteWins,
            "Xboard adjudication: King destroyed", GE_XBOARD );
        return 1;
      }
    }

    /* Bare King in Shatranj (loses) or Losers (wins) */
    if( nrW == 1 || nrB == 1) {
      if( gameInfo.variant == VariantLosers) { // [HGM] losers: bare King wins (stm must have it first)
        boards[forwardMostMove][EP_STATUS] = EP_WINS;  // mark as win, so it becomes claimable
        if(canAdjudicate && appData.checkMates) {
          if(engineOpponent)
            SendMoveToProgram(forwardMostMove-1, engineOpponent); // make sure opponent gets to see move
          GameEnds( WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins,
              "Xboard adjudication: Bare king", GE_XBOARD );
          return 1;
        }
      } else
        if( gameInfo.variant == VariantShatranj && --bare < 0)
        {    /* bare King */
          boards[forwardMostMove][EP_STATUS] = EP_WINS; // make claimable as win for stm
          if(canAdjudicate && appData.checkMates) {
            /* but only adjudicate if adjudication enabled */
            if(engineOpponent)
              SendMoveToProgram(forwardMostMove-1, engineOpponent); // make sure opponent gets move
            GameEnds( nrW > 1 ? WhiteWins : nrB > 1 ? BlackWins : GameIsDrawn,
                "Xboard adjudication: Bare king", GE_XBOARD );
            return 1;
          }
        }
    } else bare = 1;


    // don't wait for engine to announce game end if we can judge ourselves
    switch (MateTest(boards[forwardMostMove], PosFlags(forwardMostMove)) ) {
      case MT_CHECK:
        if(gameInfo.variant == Variant3Check) { // [HGM] 3check: when in check, test if 3rd time
          int i, checkCnt = 0;    // (should really be done by making nr of checks part of game state)
          for(i=forwardMostMove-2; i>=backwardMostMove; i-=2) {
            if(MateTest(boards[i], PosFlags(i)) == MT_CHECK)
              checkCnt++;
            if(checkCnt >= 2) {
              reason = "Xboard adjudication: 3rd check";
              boards[forwardMostMove][EP_STATUS] = EP_CHECKMATE;
              break;
            }
          }
        }
      case MT_NONE:
      default:
        break;
      case MT_STEALMATE:
      case MT_STALEMATE:
      case MT_STAINMATE:
        reason = "Xboard adjudication: Stalemate";
        if((signed char)boards[forwardMostMove][EP_STATUS] != EP_CHECKMATE) { // [HGM] don't touch win through baring or K-capt
          boards[forwardMostMove][EP_STATUS] = EP_STALEMATE;   // default result for stalemate is draw
          if(gameInfo.variant == VariantLosers  || gameInfo.variant == VariantGiveaway) // [HGM] losers:
            boards[forwardMostMove][EP_STATUS] = EP_WINS;    // in these variants stalemated is always a win
          else if(gameInfo.variant == VariantSuicide) // in suicide it depends
            boards[forwardMostMove][EP_STATUS] = nrW == nrB ? EP_STALEMATE :
              ((nrW < nrB) != WhiteOnMove(forwardMostMove) ?
               EP_CHECKMATE : EP_WINS);
          else if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantXiangqi || gameInfo.variant == VariantShogi)
            boards[forwardMostMove][EP_STATUS] = EP_CHECKMATE; // and in these variants being stalemated loses
        }
        break;
      case MT_CHECKMATE:
        reason = "Xboard adjudication: Checkmate";
        boards[forwardMostMove][EP_STATUS] = (gameInfo.variant == VariantLosers ? EP_WINS : EP_CHECKMATE);
        if(gameInfo.variant == VariantShogi) {
          if(forwardMostMove > backwardMostMove
              && moveList[forwardMostMove-1][1] == '@'
              && CharToPiece(ToUpper(moveList[forwardMostMove-1][0])) == WhitePawn) {
            reason = "XBoard adjudication: pawn-drop mate";
            boards[forwardMostMove][EP_STATUS] = EP_WINS;
          }
        }
        break;
    }

    switch(i = (signed char)boards[forwardMostMove][EP_STATUS]) {
      case EP_STALEMATE:
        result = GameIsDrawn; break;
      case EP_CHECKMATE:
        result = WhiteOnMove(forwardMostMove) ? BlackWins : WhiteWins; break;
      case EP_WINS:
        result = WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins; break;
      default:
        result = EndOfFile;
    }
    if(canAdjudicate && appData.checkMates && result) { // [HGM] mates: adjudicate finished games if requested
      if(engineOpponent)
        SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
      GameEnds( result, reason, GE_XBOARD );
      return 1;
    }

    /* Next absolutely insufficient mating material. */
    if(!MatingPotential(nr, WhitePawn, nrW, nrB, staleW, bishopColor) &&
        !MatingPotential(nr, BlackPawn, nrB, nrW, staleB, bishopColor))
    {    /* includes KBK, KNK, KK of KBKB with like Bishops */

      /* always flag draws, for judging claims */
      boards[forwardMostMove][EP_STATUS] = EP_INSUF_DRAW;

      if(canAdjudicate && appData.materialDraws) {
        /* but only adjudicate them if adjudication enabled */
        if(engineOpponent) {
          SendToProgram("force\n", engineOpponent); // suppress reply
          SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see last move */
        }
        GameEnds( GameIsDrawn, "Xboard adjudication: Insufficient mating material", GE_XBOARD );
        return 1;
      }
    }

    /* Then some trivial draws (only adjudicate, cannot be claimed) */
    if(gameInfo.variant == VariantXiangqi ?
        SufficientDefence(nr, WhitePawn, nrW, nrB) && SufficientDefence(nr, BlackPawn, nrB, nrW)
        : nrW + nrB == 4 &&
        (   nr[WhiteRook] == 1 && nr[BlackRook] == 1 /* KRKR */
            || nr[WhiteQueen] && nr[BlackQueen]==1     /* KQKQ */
            || nr[WhiteKnight]==2 || nr[BlackKnight]==2     /* KNNK */
            || nr[WhiteKnight]+nr[WhiteBishop] == 1 && nr[BlackKnight]+nr[BlackBishop] == 1 /* KBKN, KBKB, KNKN */
        ) ) {
      if(--moveCount < 0 && appData.trivialDraws && canAdjudicate)
      {    /* if the first 3 moves do not show a tactical win, declare draw */
        if(engineOpponent) {
          SendToProgram("force\n", engineOpponent); // suppress reply
          SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
        }
        GameEnds( GameIsDrawn, "Xboard adjudication: Trivial draw", GE_XBOARD );
        return 1;
      }
    } else moveCount = 6;
  }

  // Repetition draws and 50-move rule can be applied independently of legality testing

  /* Check for rep-draws */
  count = 0;
  drop = gameInfo.holdingsSize && (gameInfo.variant != VariantSuper && gameInfo.variant != VariantSChess
      && gameInfo.variant != VariantGreat && gameInfo.variant != VariantGrand);
  for(k = forwardMostMove-2;
      k>=backwardMostMove && k>=forwardMostMove-100 && (drop ||
        (signed char)boards[k][EP_STATUS] < EP_UNKNOWN &&
        (signed char)boards[k+2][EP_STATUS] <= EP_NONE && (signed char)boards[k+1][EP_STATUS] <= EP_NONE);
      k-=2)
  {   int rights=0;
    if(CompareBoards(boards[k], boards[forwardMostMove])) {
      /* compare castling rights */
      if( boards[forwardMostMove][CASTLING][2] != boards[k][CASTLING][2] &&
          (boards[k][CASTLING][0] != NoRights || boards[k][CASTLING][1] != NoRights) )
        rights++; /* King lost rights, while rook still had them */
      if( boards[forwardMostMove][CASTLING][2] != NoRights ) { /* king has rights */
        if( boards[forwardMostMove][CASTLING][0] != boards[k][CASTLING][0] ||
            boards[forwardMostMove][CASTLING][1] != boards[k][CASTLING][1] )
          rights++; /* but at least one rook lost them */
      }
      if( boards[forwardMostMove][CASTLING][5] != boards[k][CASTLING][5] &&
          (boards[k][CASTLING][3] != NoRights || boards[k][CASTLING][4] != NoRights) )
        rights++;
      if( boards[forwardMostMove][CASTLING][5] != NoRights ) {
        if( boards[forwardMostMove][CASTLING][3] != boards[k][CASTLING][3] ||
            boards[forwardMostMove][CASTLING][4] != boards[k][CASTLING][4] )
          rights++;
      }
      if( rights == 0 && ++count > appData.drawRepeats-2 && canAdjudicate
          && appData.drawRepeats > 1) {
        /* adjudicate after user-specified nr of repeats */
        int result = GameIsDrawn;
        char *details = "XBoard adjudication: repetition draw";
        if((gameInfo.variant == VariantXiangqi || gameInfo.variant == VariantShogi) && appData.testLegality) {
          // [HGM] xiangqi: check for forbidden perpetuals
          int m, ourPerpetual = 1, hisPerpetual = 1;
          for(m=forwardMostMove; m>k; m-=2) {
            if(MateTest(boards[m], PosFlags(m)) != MT_CHECK)
              ourPerpetual = 0; // the current mover did not always check
            if(MateTest(boards[m-1], PosFlags(m-1)) != MT_CHECK)
              hisPerpetual = 0; // the opponent did not always check
          }
          if(appData.debugMode) fprintf(debugFP, "XQ perpetual test, our=%d, his=%d\n",
              ourPerpetual, hisPerpetual);
          if(ourPerpetual && !hisPerpetual) { // we are actively checking him: forfeit
            result = WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins;
            details = "Xboard adjudication: perpetual checking";
          } else
            if(hisPerpetual && !ourPerpetual) { // he is checking us, but did not repeat yet
              break; // (or we would have caught him before). Abort repetition-checking loop.
            } else
              if(gameInfo.variant == VariantShogi) { // in Shogi other repetitions are draws
                if(BOARD_HEIGHT == 5 && BOARD_RGHT - BOARD_LEFT == 5) { // but in mini-Shogi gote wins!
                  result = BlackWins;
                  details = "Xboard adjudication: repetition";
                }
              } else // it must be XQ
                // Now check for perpetual chases
                if(!ourPerpetual && !hisPerpetual) { // no perpetual check, test for chase
                  hisPerpetual = PerpetualChase(k, forwardMostMove);
                  ourPerpetual = PerpetualChase(k+1, forwardMostMove);
                  if(ourPerpetual && !hisPerpetual) { // we are actively chasing him: forfeit
                    static char resdet[MSG_SIZ];
                    result = WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins;
                    details = resdet;
                    snprintf(resdet, MSG_SIZ, "Xboard adjudication: perpetual chasing of %c%c", ourPerpetual>>8, ourPerpetual&255);
                  } else
                    if(hisPerpetual && !ourPerpetual)   // he is chasing us, but did not repeat yet
                      break; // Abort repetition-checking loop.
                }
          // if neither of us is checking or chasing all the time, or both are, it is draw
        }
        if(engineOpponent) {
          SendToProgram("force\n", engineOpponent); // suppress reply
          SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
        }
        GameEnds( result, details, GE_XBOARD );
        return 1;
      }
      if( rights == 0 && count > 1 ) /* occurred 2 or more times before */
        boards[forwardMostMove][EP_STATUS] = EP_REP_DRAW;
    }
  }

  /* Now we test for 50-move draws. Determine ply count */
  count = forwardMostMove;
  /* look for last irreversble move */
  while( (signed char)boards[count][EP_STATUS] <= EP_NONE && count > backwardMostMove )
    count--;
  /* if we hit starting position, add initial plies */
  if( count == backwardMostMove )
    count -= initialRulePlies;
  count = forwardMostMove - count;
  if(gameInfo.variant == VariantXiangqi && ( count >= 100 || count >= 2*appData.ruleMoves ) ) {
    // adjust reversible move counter for checks in Xiangqi
    int i = forwardMostMove - count, inCheck = 0, lastCheck;
    if(i < backwardMostMove) i = backwardMostMove;
    while(i <= forwardMostMove) {
      lastCheck = inCheck; // check evasion does not count
      inCheck = (MateTest(boards[i], PosFlags(i)) == MT_CHECK);
      if(inCheck || lastCheck) count--; // check does not count
      i++;
    }
  }
  if( count >= 100)
    boards[forwardMostMove][EP_STATUS] = EP_RULE_DRAW;
  /* this is used to judge if draw claims are legal */
  if(canAdjudicate && appData.ruleMoves > 0 && count >= 2*appData.ruleMoves) {
    if(engineOpponent) {
      SendToProgram("force\n", engineOpponent); // suppress reply
      SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
    }
    GameEnds( GameIsDrawn, "Xboard adjudication: 50-move rule", GE_XBOARD );
    return 1;
  }

  /* if draw offer is pending, treat it as a draw claim
   * when draw condition present, to allow engines a way to
   * claim draws before making their move to avoid a race
   * condition occurring after their move
   */
  if((gameMode == TwoMachinesPlay ? second.offeredDraw : userOfferedDraw) || first.offeredDraw ) {
    char *p = NULL;
    if((signed char)boards[forwardMostMove][EP_STATUS] == EP_RULE_DRAW)
      p = "Draw claim: 50-move rule";
    if((signed char)boards[forwardMostMove][EP_STATUS] == EP_REP_DRAW)
      p = "Draw claim: 3-fold repetition";
    if((signed char)boards[forwardMostMove][EP_STATUS] == EP_INSUF_DRAW)
      p = "Draw claim: insufficient mating material";
    if( p != NULL && canAdjudicate) {
      if(engineOpponent) {
        SendToProgram("force\n", engineOpponent); // suppress reply
        SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
      }
      GameEnds( GameIsDrawn, p, GE_XBOARD );
      return 1;
    }
  }

  if( canAdjudicate && appData.adjudicateDrawMoves > 0 && forwardMostMove > (2*appData.adjudicateDrawMoves) ) {
    if(engineOpponent) {
      SendToProgram("force\n", engineOpponent); // suppress reply
      SendMoveToProgram(forwardMostMove-1, engineOpponent); /* make sure opponent gets to see move */
    }
    GameEnds( GameIsDrawn, "Xboard adjudication: long game", GE_XBOARD );
    return 1;
  }
  return 0;
}

typedef int (CDECL *PPROBE_EGBB) (int player, int *piece, int *square);
typedef int (CDECL *PLOAD_EGBB) (char *path, int cache_size, int load_options);
static int egbbCode[] = { 6, 5, 4, 3, 2, 1 };

static int BitbaseProbe ()
{
  int pieces[10], squares[10], cnt=0, r, f, res;
  static int loaded;
  static PPROBE_EGBB probeBB;
  if(!appData.testLegality) return 10;
  if(BOARD_HEIGHT != 8 || BOARD_RGHT-BOARD_LEFT != 8) return 12;
  if(gameInfo.holdingsSize && gameInfo.variant != VariantSuper && gameInfo.variant != VariantSChess) return 12;
  if(loaded == 2 && forwardMostMove < 2) loaded = 0; // retry on new game
  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
    ChessSquare piece = boards[forwardMostMove][r][f];
    int black = (piece >= BlackPawn);
    int type = piece - black*BlackPawn;
    if(piece == EmptySquare) continue;
    if(type != WhiteKing && type > WhiteQueen) return 12; // unorthodox piece
    if(type == WhiteKing) type = WhiteQueen + 1;
    type = egbbCode[type];
    squares[cnt] = r*(BOARD_RGHT - BOARD_LEFT) + f - BOARD_LEFT;
    pieces[cnt] = type + black*6;
    if(++cnt > 5) return 11;
  }
  pieces[cnt] = squares[cnt] = 0;
  // probe EGBB
  if(loaded == 2) return 13; // loading failed before
  if(loaded == 0) {
    char *p, *path = strstr(appData.egtFormats, "scorpio:"), buf[MSG_SIZ];
    HMODULE lib;
    PLOAD_EGBB loadBB;
    loaded = 2; // prepare for failure
    if(!path) return 13; // no egbb installed
    strncpy(buf, path + 8, MSG_SIZ);
    if(p = strchr(buf, ',')) *p = NULLCHAR; else p = buf + strlen(buf);
    snprintf(p, MSG_SIZ - strlen(buf), "%c%s", SLASH, EGBB_NAME);
    lib = LoadLibrary(buf);
    if(!lib) { DisplayError(_("could not load EGBB library"), 0); return 13; }
    loadBB = (PLOAD_EGBB) GetProcAddress(lib, "load_egbb_xmen");
    probeBB = (PPROBE_EGBB) GetProcAddress(lib, "probe_egbb_xmen");
    if(!loadBB || !probeBB) { DisplayError(_("wrong EGBB version"), 0); return 13; }
    p[1] = NULLCHAR; loadBB(buf, 64*1028, 2); // 2 = SMART_LOAD
    loaded = 1; // success!
  }
  res = probeBB(forwardMostMove & 1, pieces, squares);
  return res > 0 ? 1 : res < 0 ? -1 : 0;
}

char *SendMoveToBookUser (int moveNr, ChessProgramState *cps, int initial)
{   // [HGM] book: this routine intercepts moves to simulate book replies
  char *bookHit = NULL;

  if(cps->drawDepth && BitbaseProbe() == 0) { // [HGM egbb: reduce depth in drawn position
    char buf[MSG_SIZ];
    snprintf(buf, MSG_SIZ, "sd %d\n", cps->drawDepth);
    SendToProgram(buf, cps);
  }
  //first determine if the incoming move brings opponent into his book
  if(appData.usePolyglotBook && (cps == &first ? !appData.firstHasOwnBookUCI : !appData.secondHasOwnBookUCI))
    bookHit = ProbeBook(moveNr+1, appData.polyglotBook); // returns move
  if(appData.debugMode) fprintf(debugFP, "book hit = %s\n", bookHit ? bookHit : "(NULL)");
  if(bookHit != NULL && !cps->bookSuspend) {
    // make sure opponent is not going to reply after receiving move to book position
    SendToProgram("force\n", cps);
    cps->bookSuspend = TRUE; // flag indicating it has to be restarted
  }
  if(bookHit) setboardSpoiledMachineBlack = FALSE; // suppress 'go' in SendMoveToProgram
  if(!initial) SendMoveToProgram(moveNr, cps); // with hit on initial position there is no move
  // now arrange restart after book miss
  if(bookHit) {
    // after a book hit we never send 'go', and the code after the call to this routine
    // has '&& !bookHit' added to suppress potential sending there (based on 'firstMove').
    char buf[MSG_SIZ], *move = bookHit;
    if(cps->useSAN) {
      int fromX, fromY, toX, toY;
      char promoChar;
      ChessMove moveType;
      move = buf + 30;
      if (ParseOneMove(bookHit, forwardMostMove, &moveType,
            &fromX, &fromY, &toX, &toY, &promoChar)) {
        (void) CoordsToAlgebraic(boards[forwardMostMove],
            PosFlags(forwardMostMove),
            fromY, fromX, toY, toX, promoChar, move);
      } else {
        if(appData.debugMode) fprintf(debugFP, "Book move could not be parsed\n");
        bookHit = NULL;
      }
    }
    snprintf(buf, MSG_SIZ, "%s%s\n", (cps->useUsermove ? "usermove " : ""), move); // force book move into program supposed to play it
    SendToProgram(buf, cps);
    if(!initial) firstMove = FALSE; // normally we would clear the firstMove condition after return & sending 'go'
  } else if(initial) { // 'go' was needed irrespective of firstMove, and it has to be done in this routine
    SendToProgram("go\n", cps);
    cps->bookSuspend = FALSE; // after a 'go' we are never suspended
  } else { // 'go' might be sent based on 'firstMove' after this routine returns
    if(cps->bookSuspend && !firstMove) // 'go' needed, and it will not be done after we return
      SendToProgram("go\n", cps);
    cps->bookSuspend = FALSE; // anyhow, we will not be suspended after a miss
  }
  return bookHit; // notify caller of hit, so it can take action to send move to opponent
}

int LoadError (char *errmess, ChessProgramState *cps)
{   // unloads engine and switches back to -ncp mode if it was first
  if(cps->initDone) return FALSE;
  cps->isr = NULL; // this should suppress further error popups from breaking pipes
  DestroyChildProcess(cps->pr, 9 ); // just to be sure
  cps->pr = NoProc;
  if(cps == &first) {
    appData.noChessProgram = TRUE;
    gameMode = MachinePlaysBlack; ModeHighlight(); // kludge to unmark Machine Black menu
    gameMode = BeginningOfGame; ModeHighlight();
    SetNCPMode();
  }
  if(GetDelayedEvent()) CancelDelayedEvent(), ThawUI(); // [HGM] cancel remaining loading effort scheduled after feature timeout
  DisplayMessage("", ""); // erase waiting message
  if(errmess) DisplayError(errmess, 0); // announce reason, if given
  return TRUE;
}

char *savedMessage;
ChessProgramState *savedState;
void DeferredBookMove (void)
{
  if(savedState->lastPing != savedState->lastPong)
    ScheduleDelayedEvent(DeferredBookMove, 10);
  else
    HandleMachineMove(savedMessage, savedState);
}

static int savedWhitePlayer, savedBlackPlayer, pairingReceived;
static ChessProgramState *stalledEngine;
static char stashedInputMove[MSG_SIZ], abortEngineThink;

void HandleMachineMove (char *message, ChessProgramState *cps)
{
  static char firstLeg[20], legs;
  char machineMove[MSG_SIZ], buf1[MSG_SIZ*10], buf2[MSG_SIZ];
  char realname[MSG_SIZ];
  int fromX, fromY, toX, toY;
  ChessMove moveType;
  char promoChar, roar;
  char *p, *pv=buf1;
  int oldError;
  char *bookHit;

  if(cps == &pairing && sscanf(message, "%d-%d", &savedWhitePlayer, &savedBlackPlayer) == 2) {
    // [HGM] pairing: Mega-hack! Pairing engine also uses this routine (so it could give other WB commands).
    if(savedWhitePlayer == 0 || savedBlackPlayer == 0) {
      DisplayError(_("Invalid pairing from pairing engine"), 0);
      return;
    }
    pairingReceived = 1;
    NextMatchGame();
    return; // Skim the pairing messages here.
  }

  oldError = cps->userError; cps->userError = 0;

FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book hit
  /*
   * Kludge to ignore BEL characters
   */
  while (*message == '\007') message++;

  /*
   * [HGM] engine debug message: ignore lines starting with '#' character
   */
  if(cps->debug && *message == '#') return;

  /*
   * Look for book output
   */
  if (cps == &first && bookRequested) {
    if (message[0] == '\t' || message[0] == ' ') {
      /* Part of the book output is here; append it */
      strcat(bookOutput, message);
      strcat(bookOutput, "  \n");
      return;
    } else if (bookOutput[0] != NULLCHAR) {
      /* All of book output has arrived; display it */
      char *p = bookOutput;
      while (*p != NULLCHAR) {
        if (*p == '\t') *p = ' ';
        p++;
      }
      DisplayInformation(bookOutput);
      bookRequested = FALSE;
      /* Fall through to parse the current output */
    }
  }

  /*
   * Look for machine move.
   */
  if ((sscanf(message, "%s %s %s", buf1, buf2, machineMove) == 3 && strcmp(buf2, "...") == 0) ||
      (sscanf(message, "%s %s", buf1, machineMove) == 2 && strcmp(buf1, "move") == 0))
  {
    if(pausing && !cps->pause) { // for pausing engine that does not support 'pause', we stash its move for processing when we resume.
      if(appData.debugMode) fprintf(debugFP, "pause %s engine after move\n", cps->which);
      safeStrCpy(stashedInputMove, message, MSG_SIZ);
      stalledEngine = cps;
      if(appData.ponderNextMove) { // bring opponent out of ponder
        if(gameMode == TwoMachinesPlay) {
          if(cps->other->pause)
            PauseEngine(cps->other);
          else
            SendToProgram("easy\n", cps->other);
        }
      }
      StopClocks();
      return;
    }

    if(cps->usePing) {

      /* This method is only useful on engines that support ping */
      if(abortEngineThink) {
        if (appData.debugMode) {
          fprintf(debugFP, "Undoing move from aborted think of %s\n", cps->which);
        }
        SendToProgram("undo\n", cps);
        return;
      }

      if (cps->lastPing != cps->lastPong) {
        /* Extra move from before last new; ignore */
        if (appData.debugMode) {
          fprintf(debugFP, "Ignoring extra move from %s\n", cps->which);
        }
        return;
      }

    } else {

      int machineWhite = FALSE;

      switch (gameMode) {
        case BeginningOfGame:
          /* Extra move from before last reset; ignore */
          if (appData.debugMode) {
            fprintf(debugFP, "Ignoring extra move from %s\n", cps->which);
          }
          return;

        case EndOfGame:
        case IcsIdle:
        default:
          /* Extra move after we tried to stop.  The mode test is
             not a reliable way of detecting this problem, but it's
             the best we can do on engines that don't support ping.
             */
          if (appData.debugMode) {
            fprintf(debugFP, "Undoing extra move from %s, gameMode %d\n",
                cps->which, gameMode);
          }
          SendToProgram("undo\n", cps);
          return;

        case MachinePlaysWhite:
        case IcsPlayingWhite:
          machineWhite = TRUE;
          break;

        case MachinePlaysBlack:
        case IcsPlayingBlack:
          machineWhite = FALSE;
          break;

        case TwoMachinesPlay:
          machineWhite = (cps->twoMachinesColor[0] == 'w');
          break;
      }
      if (WhiteOnMove(forwardMostMove) != machineWhite) {
        if (appData.debugMode) {
          fprintf(debugFP,
              "Ignoring move out of turn by %s, gameMode %d"
              ", forwardMost %d\n",
              cps->which, gameMode, forwardMostMove);
        }
        return;
      }
    }

    if(cps->alphaRank) AlphaRank(machineMove, 4);

    // [HGM] lion: (some very limited) support for Alien protocol
    killX = killY = kill2X = kill2Y = -1;
    if(machineMove[strlen(machineMove)-1] == ',') { // move ends in coma: non-final leg of composite move
      if(legs++) return;                     // middle leg contains only redundant info, ignore (but count it)
      safeStrCpy(firstLeg, machineMove, 20); // just remember it for processing when second leg arrives
      return;
    }
    if(p = strchr(machineMove, ',')) {         // we got both legs in one (happens on book move)
      char *q = strchr(p+1, ',');            // second comma?
      safeStrCpy(firstLeg, machineMove, 20); // kludge: fake we received the first leg earlier, and clip it off
      if(q) legs = 2, p = q; else legs = 1;  // with 3-leg move we clipof first two legs!
      safeStrCpy(machineMove, firstLeg + (p - machineMove) + 1, 20);
    }
    if(firstLeg[0]) { // there was a previous leg;
      // only support case where same piece makes two step
      char buf[20], *p = machineMove+1, *q = buf+1, f;
      safeStrCpy(buf, machineMove, 20);
      while(isdigit(*q)) q++; // find start of to-square
      safeStrCpy(machineMove, firstLeg, 20);
      while(isdigit(*p)) p++; // to-square of first leg (which is now copied to machineMove)
      if(legs == 2) sscanf(p, "%c%d", &f, &kill2Y), kill2X = f - AAA, kill2Y -= ONE - '0'; // in 3-leg move 2nd kill is to-sqr of 1st leg
      else if(*p == *buf)   // if first-leg to not equal to second-leg from first leg says unmodified (assume it is King move of castling)
        safeStrCpy(p, q, 20); // glue to-square of second leg to from-square of first, to process over-all move
      sscanf(buf, "%c%d", &f, &killY); killX = f - AAA; killY -= ONE - '0'; // pass intermediate square to MakeMove in global
      firstLeg[0] = NULLCHAR; legs = 0;
    }

    if (!ParseOneMove(machineMove, forwardMostMove, &moveType,
          &fromX, &fromY, &toX, &toY, &promoChar)) {
      /* Machine move could not be parsed; ignore it. */
      snprintf(buf1, MSG_SIZ*10, _("Illegal move \"%s\" from %s machine"),
          machineMove, _(cps->which));
      DisplayMoveError(buf1);
      snprintf(buf1, MSG_SIZ*10, "Xboard: Forfeit due to invalid move: %s (%c%c%c%c via %c%c, %c%c) res=%d",
          machineMove, fromX+AAA, fromY+ONE, toX+AAA, toY+ONE, killX+AAA, killY+ONE, kill2X+AAA, kill2Y+ONE, moveType);
      if (gameMode == TwoMachinesPlay) {
        GameEnds(cps->twoMachinesColor[0] == 'w' ? BlackWins : WhiteWins,
            buf1, GE_XBOARD);
      }
      return;
    }

    /* [HGM] Apparently legal, but so far only tested with EP_UNKOWN */
    /* So we have to redo legality test with true e.p. status here,  */
    /* to make sure an illegal e.p. capture does not slip through,   */
    /* to cause a forfeit on a justified illegal-move complaint      */
    /* of the opponent.                                              */
    if( gameMode==TwoMachinesPlay && appData.testLegality ) {
      ChessMove moveType;
      moveType = LegalityTest(boards[forwardMostMove], PosFlags(forwardMostMove),
          fromY, fromX, toY, toX, promoChar);
      if(moveType == IllegalMove) {
        snprintf(buf1, MSG_SIZ*10, "Xboard: Forfeit due to illegal move: %s (%c%c%c%c)%c",
            machineMove, fromX+AAA, fromY+ONE, toX+AAA, toY+ONE, 0);
        GameEnds(cps->twoMachinesColor[0] == 'w' ? BlackWins : WhiteWins,
            buf1, GE_XBOARD);
        return;
      } else if(!appData.fischerCastling)
        /* [HGM] Kludge to handle engines that send FRC-style castling
           when they shouldn't (like TSCP-Gothic) */
        switch(moveType) {
          case WhiteASideCastleFR:
          case BlackASideCastleFR:
            toX+=2;
            currentMoveString[2]++;
            break;
          case WhiteHSideCastleFR:
          case BlackHSideCastleFR:
            toX--;
            currentMoveString[2]--;
            break;
          default: ; // nothing to do, but suppresses warning of pedantic compilers
        }
    }
    hintRequested = FALSE;
    lastHint[0] = NULLCHAR;
    bookRequested = FALSE;
    /* Program may be pondering now */
    cps->maybeThinking = TRUE;
    if (cps->sendTime == 2) cps->sendTime = 1;
    if (cps->offeredDraw) cps->offeredDraw--;

    /* [AS] Save move info*/
    pvInfoList[ forwardMostMove ].score = programStats.score;
    pvInfoList[ forwardMostMove ].depth = programStats.depth;
    pvInfoList[ forwardMostMove ].time =  programStats.time; // [HGM] PGNtime: take time from engine stats

    MakeMove(fromX, fromY, toX, toY, promoChar);/*updates forwardMostMove*/

    /* Test suites abort the 'game' after one move */
    if(*appData.finger) {
      static FILE *f;
      char *fen = PositionToFEN(backwardMostMove, NULL, 0); // no counts in EPD
      if(!f) f = fopen(appData.finger, "w");
      if(f) fprintf(f, "%s bm %s;\n", fen, parseList[backwardMostMove]), fflush(f);
      else { DisplayFatalError("Bad output file", errno, 0); return; }
      free(fen);
      GameEnds(GameUnfinished, NULL, GE_XBOARD);
    }
    if(appData.epd) {
      if(solvingTime >= 0) {
        snprintf(buf1, MSG_SIZ, "%d. %4.2fs: %s ", matchGame, solvingTime/100., parseList[backwardMostMove]);
        totalTime += solvingTime; first.matchWins++; solvingTime = -1;
      } else {
        snprintf(buf1, MSG_SIZ, "%d. %s?%s ", matchGame, parseList[backwardMostMove], solvingTime == -2 ? " ???" : "");
        if(solvingTime == -2) second.matchWins++;
      }
      OutputKibitz(2, buf1);
      GameEnds(GameUnfinished, NULL, GE_XBOARD);
    }

    /* [AS] Adjudicate game if needed (note: remember that forwardMostMove now points past the last move) */
    if( gameMode == TwoMachinesPlay && appData.adjudicateLossThreshold != 0 && forwardMostMove >= adjudicateLossPlies ) {
      int count = 0;

      while( count < adjudicateLossPlies ) {
        int score = pvInfoList[ forwardMostMove - count - 1 ].score;

        if( count & 1 ) {
          score = -score; /* Flip score for winning side */
        }

        if( score > appData.adjudicateLossThreshold ) {
          break;
        }

        count++;
      }

      if( count >= adjudicateLossPlies ) {
        ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/

        GameEnds( WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins,
            "Xboard adjudication",
            GE_XBOARD );

        return;
      }
    }

    if(Adjudicate(cps)) {
      ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/
      return; // [HGM] adjudicate: for all automatic game ends
    }

#if ZIPPY
    if ((gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack) &&
        first.initDone) {
      if(cps->offeredDraw && (signed char)boards[forwardMostMove][EP_STATUS] <= EP_DRAWS) {
        SendToICS(ics_prefix); // [HGM] drawclaim: send caim and move on one line for FICS
        SendToICS("draw ");
        SendMoveToICS(moveType, fromX, fromY, toX, toY, promoChar);
      }
      SendMoveToICS(moveType, fromX, fromY, toX, toY, promoChar);
      ics_user_moved = 1;
      if(appData.autoKibitz && !appData.icsEngineAnalyze ) { /* [HGM] kibitz: send most-recent PV info to ICS */
        char buf[3*MSG_SIZ];

        snprintf(buf, 3*MSG_SIZ, "kibitz !!! %+.2f/%d (%.2f sec, %u nodes, %.0f knps) PV=%s\n",
            programStats.score / 100.,
            programStats.depth,
            programStats.time / 100.,
            (unsigned int)programStats.nodes,
            (unsigned int)programStats.nodes / (10*abs(programStats.time) + 1.),
            programStats.movelist);
        SendToICS(buf);
      }
    }
#endif

    /* [AS] Clear stats for next move */
    ClearProgramStats();
    thinkOutput[0] = NULLCHAR;
    hiddenThinkOutputState = 0;

    bookHit = NULL;
    if (gameMode == TwoMachinesPlay) {
      /* [HGM] relaying draw offers moved to after reception of move */
      /* and interpreting offer as claim if it brings draw condition */
      if (cps->offeredDraw == 1 && cps->other->sendDrawOffers) {
        SendToProgram("draw\n", cps->other);
      }
      if (cps->other->sendTime) {
        SendTimeRemaining(cps->other,
            cps->other->twoMachinesColor[0] == 'w');
      }
      bookHit = SendMoveToBookUser(forwardMostMove-1, cps->other, FALSE);
      if (firstMove && !bookHit) {
        firstMove = FALSE;
        if (cps->other->useColors) {
          SendToProgram(cps->other->twoMachinesColor, cps->other);
        }
        SendToProgram("go\n", cps->other);
      }
      cps->other->maybeThinking = TRUE;
    }

    roar = (killX >= 0 && IS_LION(boards[forwardMostMove][toY][toX]));

    ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/

    if (!pausing && appData.ringBellAfterMoves) {
      if(!roar) RingBell();
    }

    /*
     * Reenable menu items that were disabled while
     * machine was thinking
     */
    if (gameMode != TwoMachinesPlay)
      SetUserThinkingEnables();

    // [HGM] book: after book hit opponent has received move and is now in force mode
    // force the book reply into it, and then fake that it outputted this move by jumping
    // back to the beginning of HandleMachineMove, with cps toggled and message set to this move
    if(bookHit) {
      static char bookMove[MSG_SIZ]; // a bit generous?

      safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
      strcat(bookMove, bookHit);
      message = bookMove;
      cps = cps->other;
      programStats.nodes = programStats.depth = programStats.time =
        programStats.score = programStats.got_only_move = 0;
      sprintf(programStats.movelist, "%s (xbook)", bookHit);

      if(cps->lastPing != cps->lastPong) {
        savedMessage = message; // args for deferred call
        savedState = cps;
        ScheduleDelayedEvent(DeferredBookMove, 10);
        return;
      }
      goto FakeBookMove;
    }

    return;
  }

  /* Set special modes for chess engines.  Later something general
   *  could be added here; for now there is just one kludge feature,
   *  needed because Crafty 15.10 and earlier don't ignore SIGINT
   *  when "xboard" is given as an interactive command.
   */
  if (strncmp(message, "kibitz Hello from Crafty", 24) == 0) {
    cps->useSigint = FALSE;
    cps->useSigterm = FALSE;
  }
  if (strncmp(message, "feature ", 8) == 0) { // [HGM] moved forward to pre-empt non-compliant commands
    ParseFeatures(message+8, cps);
    return; // [HGM] This return was missing, causing option features to be recognized as non-compliant commands!
  }

  if (!strncmp(message, "setup ", 6) && 
      (!appData.testLegality || gameInfo.variant == VariantFairy || gameInfo.variant == VariantUnknown ||
       NonStandardBoardSize(gameInfo.variant, gameInfo.boardWidth, gameInfo.boardHeight, gameInfo.holdingsSize))
     ) { // [HGM] allow first engine to define opening position
    int dummy, w, h, hand, s=6; char buf[MSG_SIZ], varName[MSG_SIZ];
    if(appData.icsActive || forwardMostMove != 0 || cps != &first) return;
    *buf = NULLCHAR;
    if(sscanf(message, "setup (%s", buf) == 1) {
      s = 8 + strlen(buf), buf[s-9] = NULLCHAR, SetCharTableEsc(pieceToChar, buf, SUFFIXES);
      ASSIGN(appData.pieceToCharTable, buf);
    }
    dummy = sscanf(message+s, "%dx%d+%d_%s", &w, &h, &hand, varName);
    if(dummy >= 3) {
      while(message[s] && message[s++] != ' ');
      if(BOARD_HEIGHT != h || BOARD_WIDTH != w + 4*(hand != 0) || gameInfo.holdingsSize != hand ||
          dummy == 4 && gameInfo.variant != StringToVariant(varName) ) { // engine wants to change board format or variant
        if(hand <= h) deadRanks = 0; else deadRanks = hand - h, h = hand; // adapt board to over-sized holdings
        appData.NrFiles = w; appData.NrRanks = h; appData.holdingsSize = hand;
        if(dummy == 4) gameInfo.variant = StringToVariant(varName);     // parent variant
        InitPosition(1); // calls InitDrawingSizes to let new parameters take effect
        if(*buf) SetCharTableEsc(pieceToChar, buf, SUFFIXES); // do again, for it was spoiled by InitPosition
        startedFromSetupPosition = FALSE;
      }
    }
    if(startedFromSetupPosition) return;
    ParseFEN(boards[0], &dummy, message+s, FALSE);
    DrawPosition(TRUE, boards[0]);
    CopyBoard(initialPosition, boards[0]);
    startedFromSetupPosition = TRUE;
    return;
  }
  if(sscanf(message, "piece %s %s", buf2, buf1) == 2) {
    ChessSquare piece = WhitePawn;
    char *p=message+6, *q, *s = SUFFIXES, ID = *p, promoted = 0;
    if(*p == '+') promoted++, ID = *++p;
    if(q = strchr(s, p[1])) ID += 64*(q - s + 1), p++;
    piece = CharToPiece(ID & 255); if(promoted) piece = CHUPROMOTED(piece);
    if(cps != &first || appData.testLegality && *engineVariant == NULLCHAR
        /* always accept definition of  */       && piece != WhiteFalcon && piece != BlackFalcon
        /* wild-card pieces.            */       && piece != WhiteCobra  && piece != BlackCobra
        /* For variants we don't have   */       && gameInfo.variant != VariantBerolina
        /* correct rules for, we cannot */       && gameInfo.variant != VariantCylinder
        /* enforce legality on our own! */       && gameInfo.variant != VariantUnknown
        && gameInfo.variant != VariantGreat
        && gameInfo.variant != VariantFairy    ) return;
    if(piece < EmptySquare) {
      pieceDefs = TRUE;
      ASSIGN(pieceDesc[piece], buf1);
      if((ID & 32) == 0 && p[1] == '&') { ASSIGN(pieceDesc[WHITE_TO_BLACK piece], buf1); }
    }
    return;
  }
  if(!appData.testLegality && sscanf(message, "choice %s", promoRestrict) == 1) {
    if(deferChoice) {
      LeftClick(Press, 0, 0); // finish the click that was interrupted
    } else if(promoSweep != EmptySquare) {
      promoSweep = CharToPiece(currentMove&1 ? ToLower(*promoRestrict) : ToUpper(*promoRestrict));
      if(strlen(promoRestrict) > 1) Sweep(0);
    }
    return;
  }
  /* [HGM] Allow engine to set up a position. Don't ask me why one would
   * want this, I was asked to put it in, and obliged.
   */
  if (!strncmp(message, "setboard ", 9)) {
    Board initial_position;

    GameEnds(GameUnfinished, "Engine aborts game", GE_XBOARD);

    if (!ParseFEN(initial_position, &blackPlaysFirst, message + 9, FALSE)) {
      DisplayError(_("Bad FEN received from engine"), 0);
      return ;
    } else {
      Reset(TRUE, FALSE);
      CopyBoard(boards[0], initial_position);
      initialRulePlies = FENrulePlies;
      if(blackPlaysFirst) gameMode = MachinePlaysWhite;
      else gameMode = MachinePlaysBlack;
      DrawPosition(FALSE, boards[currentMove]);
    }
    return;
  }

  /*
   * Look for communication commands
   */
  if (!strncmp(message, "telluser ", 9)) {
    if(message[9] == '\\' && message[10] == '\\')
      EscapeExpand(message+9, message+11); // [HGM] esc: allow escape sequences in popup box
    PlayTellSound();
    DisplayNote(message + 9);
    return;
  }
  if (!strncmp(message, "tellusererror ", 14)) {
    cps->userError = 1;
    if(message[14] == '\\' && message[15] == '\\')
      EscapeExpand(message+14, message+16); // [HGM] esc: allow escape sequences in popup box
    PlayTellSound();
    DisplayError(message + 14, 0);
    return;
  }
  if (!strncmp(message, "tellopponent ", 13)) {
    if (appData.icsActive) {
      if (loggedOn) {
        snprintf(buf1, sizeof(buf1), "%ssay %s\n", ics_prefix, message + 13);
        SendToICS(buf1);
      }
    } else {
      DisplayNote(message + 13);
    }
    return;
  }
  if (!strncmp(message, "tellothers ", 11)) {
    if (appData.icsActive) {
      if (loggedOn) {
        snprintf(buf1, sizeof(buf1), "%swhisper %s\n", ics_prefix, message + 11);
        SendToICS(buf1);
      }
    } else if(appData.autoComment) AppendComment (forwardMostMove, message + 11, 1); // in local mode, add as move comment
    return;
  }
  if (!strncmp(message, "tellall ", 8)) {
    if (appData.icsActive) {
      if (loggedOn) {
        snprintf(buf1, sizeof(buf1), "%skibitz %s\n", ics_prefix, message + 8);
        SendToICS(buf1);
      }
    } else {
      DisplayNote(message + 8);
    }
    return;
  }
  if (strncmp(message, "warning", 7) == 0) {
    /* Undocumented feature, use tellusererror in new code */
    DisplayError(message, 0);
    return;
  }
  if (sscanf(message, "askuser %s %[^\n]", buf1, buf2) == 2) {
    safeStrCpy(realname, cps->tidy, sizeof(realname)/sizeof(realname[0]));
    strcat(realname, " query");
    AskQuestion(realname, buf2, buf1, cps->pr);
    return;
  }
  /* Commands from the engine directly to ICS.  We don't allow these to be
   *  sent until we are logged on. Crafty kibitzes have been known to
   *  interfere with the login process.
   */
  if (loggedOn) {
    if (!strncmp(message, "tellics ", 8)) {
      SendToICS(message + 8);
      SendToICS("\n");
      return;
    }
    if (!strncmp(message, "tellicsnoalias ", 15)) {
      SendToICS(ics_prefix);
      SendToICS(message + 15);
      SendToICS("\n");
      return;
    }
    /* The following are for backward compatibility only */
    if (!strncmp(message,"whisper",7) || !strncmp(message,"kibitz",6) ||
        !strncmp(message,"draw",4) || !strncmp(message,"tell",3)) {
      SendToICS(ics_prefix);
      SendToICS(message);
      SendToICS("\n");
      return;
    }
  }
  if (sscanf(message, "pong %d", &cps->lastPong) == 1) {
    if(initPing == cps->lastPong) {
      if(gameInfo.variant == VariantUnknown) {
        DisplayError(_("Engine did not send setup for non-standard variant"), 0);
        *engineVariant = NULLCHAR; ASSIGN(appData.variant, "normal"); // back to normal as error recovery?
        GameEnds(GameUnfinished, NULL, GE_XBOARD);
      }
      initPing = -1;
    }
    if(cps->lastPing == cps->lastPong && abortEngineThink) {
      abortEngineThink = FALSE;
      DisplayMessage("", "");
      ThawUI();
    }
    return;
  }
  if(!strncmp(message, "highlight ", 10)) {
    if(appData.testLegality && !*engineVariant && appData.markers) return;
    MarkByFEN(message+10); // [HGM] alien: allow engine to mark board squares
    return;
  }
  if(!strncmp(message, "click ", 6)) {
    char f, c=0; int x, y; // [HGM] alien: allow engine to finish user moves (i.e. engine-driven one-click moving)
    if(appData.testLegality || !appData.oneClick) return;
    sscanf(message+6, "%c%d%c", &f, &y, &c);
    x = f - 'a' + BOARD_LEFT, y -= ONE - '0';
    if(flipView) x = BOARD_WIDTH-1 - x; else y = BOARD_HEIGHT-1 - y;
    x = x*squareSize + (x+1)*lineGap + squareSize/2;
    y = y*squareSize + (y+1)*lineGap + squareSize/2;
    f = first.highlight; first.highlight = 0; // kludge to suppress lift/put in response to own clicks
    if(lastClickType == Press) // if button still down, fake release on same square, to be ready for next click
      LeftClick(Release, lastLeftX, lastLeftY);
    controlKey  = (c == ',');
    LeftClick(Press, x, y);
    LeftClick(Release, x, y);
    first.highlight = f;
    return;
  }
  if(strncmp(message, "uciok", 5) == 0) { // response to "uci" probe
    int nr = (cps == &second);
    appData.isUCI[nr] = isUCI = 1;
    ReplaceEngine(cps, nr); // retry install as UCI
    return;
  }
  /*
   * If the move is illegal, cancel it and redraw the board.
   * Also deal with other error cases.  Matching is rather loose
   * here to accommodate engines written before the spec.
   */
  if (strncmp(message + 1, "llegal move", 11) == 0 ||
      strncmp(message, "Error", 5) == 0) {
    if (StrStr(message, "name") ||
        StrStr(message, "rating") || StrStr(message, "?") ||
        StrStr(message, "result") || StrStr(message, "board") ||
        StrStr(message, "bk") || StrStr(message, "computer") ||
        StrStr(message, "variant") || StrStr(message, "hint") ||
        StrStr(message, "random") || StrStr(message, "depth") ||
        StrStr(message, "accepted")) {
      return;
    }
    if (StrStr(message, "protover")) {
      /* Program is responding to input, so it's apparently done
         initializing, and this error message indicates it is
         protocol version 1.  So we don't need to wait any longer
         for it to initialize and send feature commands. */
      FeatureDone(cps, 1);
      cps->protocolVersion = 1;
      return;
    }
    cps->maybeThinking = FALSE;

    if (StrStr(message, "draw")) {
      /* Program doesn't have "draw" command */
      cps->sendDrawOffers = 0;
      return;
    }
    if (cps->sendTime != 1 &&
        (StrStr(message, "time") || StrStr(message, "otim"))) {
      /* Program apparently doesn't have "time" or "otim" command */
      cps->sendTime = 0;
      return;
    }
    if (StrStr(message, "analyze")) {
      cps->analysisSupport = FALSE;
      cps->analyzing = FALSE;
      //	    Reset(FALSE, TRUE); // [HGM] this caused discrepancy between display and internal state!
      EditGameEvent(); // [HGM] try to preserve loaded game
      snprintf(buf2,MSG_SIZ, _("%s does not support analysis"), cps->tidy);
      DisplayError(buf2, 0);
      return;
    }
    if (StrStr(message, "(no matching move)st")) {
      /* Special kludge for GNU Chess 4 only */
      cps->stKludge = TRUE;
      SendTimeControl(cps, movesPerSession, timeControl,
          timeIncrement, appData.searchDepth,
          searchTime);
      return;
    }
    if (StrStr(message, "(no matching move)sd")) {
      /* Special kludge for GNU Chess 4 only */
      cps->sdKludge = TRUE;
      SendTimeControl(cps, movesPerSession, timeControl,
          timeIncrement, appData.searchDepth,
          searchTime);
      return;
    }
    if (!StrStr(message, "llegal")) {
      return;
    }
    if (gameMode == BeginningOfGame || gameMode == EndOfGame ||
        gameMode == IcsIdle) return;
    if (forwardMostMove <= backwardMostMove) return;
    if (pausing) PauseEvent();
    if(appData.forceIllegal) {
      // [HGM] illegal: machine refused move; force position after move into it
      SendToProgram("force\n", cps);
      if(!cps->useSetboard) { // hideous kludge on kludge, because SendBoard sucks.
        // we have a real problem now, as SendBoard will use the a2a3 kludge
        // when black is to move, while there might be nothing on a2 or black
        // might already have the move. So send the board as if white has the move.
        // But first we must change the stm of the engine, as it refused the last move
        SendBoard(cps, 0); // always kludgeless, as white is to move on boards[0]
        if(WhiteOnMove(forwardMostMove)) {
          SendToProgram("a7a6\n", cps); // for the engine black still had the move
          SendBoard(cps, forwardMostMove); // kludgeless board
        } else {
          SendToProgram("a2a3\n", cps); // for the engine white still had the move
          CopyBoard(boards[forwardMostMove+1], boards[forwardMostMove]);
          SendBoard(cps, forwardMostMove+1); // kludgeless board
        }
      } else SendBoard(cps, forwardMostMove); // FEN case, also sets stm properly
      if(gameMode == MachinePlaysWhite || gameMode == MachinePlaysBlack ||
          gameMode == TwoMachinesPlay)
        SendToProgram("go\n", cps);
      return;
    } else
      if (gameMode == PlayFromGameFile) {
        /* Stop reading this game file */
        gameMode = EditGame;
        ModeHighlight();
      }
    /* [HGM] illegal-move claim should forfeit game when Xboard */
    /* only passes fully legal moves                            */
    if( appData.testLegality && gameMode == TwoMachinesPlay ) {
      GameEnds( cps->twoMachinesColor[0] == 'w' ? BlackWins : WhiteWins,
          "False illegal-move claim", GE_XBOARD );
      return; // do not take back move we tested as valid
    }
    currentMove = forwardMostMove-1;
    DisplayMove(currentMove-1); /* before DisplayMoveError */
    SwitchClocks(forwardMostMove-1); // [HGM] race
    DisplayBothClocks();
    snprintf(buf1, 10*MSG_SIZ, _("Illegal move \"%s\" (rejected by %s chess program)"),
        parseList[currentMove], _(cps->which));
    DisplayMoveError(buf1);
    DrawPosition(FALSE, boards[currentMove]);

    SetUserThinkingEnables();
    return;
  }
  if (strncmp(message, "time", 4) == 0 && StrStr(message, "Illegal")) {
    /* Program has a broken "time" command that
       outputs a string not ending in newline.
       Don't use it. */
    cps->sendTime = 0;
  }
  if (cps->pseudo) { // [HGM] pseudo-engine, granted unusual powers
    if (sscanf(message, "wtime %ld\n", &whiteTimeRemaining) == 1 || // adjust clock times
        sscanf(message, "btime %ld\n", &blackTimeRemaining) == 1   ) return;
  }

  /*
   * If chess program startup fails, exit with an error message.
   * Attempts to recover here are futile. [HGM] Well, we try anyway
   */
  if ((StrStr(message, "unknown host") != NULL)
      || (StrStr(message, "No remote directory") != NULL)
      || (StrStr(message, "not found") != NULL)
      || (StrStr(message, "No such file") != NULL)
      || (StrStr(message, "can't alloc") != NULL)
      || (StrStr(message, "Permission denied") != NULL)) {

    cps->maybeThinking = FALSE;
    snprintf(buf1, sizeof(buf1), _("Failed to start %s chess program %s on %s: %s\n"),
        _(cps->which), cps->program, cps->host, message);
    RemoveInputSource(cps->isr);
    if(appData.icsActive) DisplayFatalError(buf1, 0, 1); else {
      if(LoadError(oldError ? NULL : buf1, cps)) return; // error has then been handled by LoadError
      if(!oldError) DisplayError(buf1, 0); // if reason neatly announced, suppress general error popup
    }
    return;
  }

  /*
   * Look for hint output
   */
  if (sscanf(message, "Hint: %s", buf1) == 1) {
    if (cps == &first && hintRequested) {
      hintRequested = FALSE;
      if (ParseOneMove(buf1, forwardMostMove, &moveType,
            &fromX, &fromY, &toX, &toY, &promoChar)) {
        (void) CoordsToAlgebraic(boards[forwardMostMove],
            PosFlags(forwardMostMove),
            fromY, fromX, toY, toX, promoChar, buf1);
        snprintf(buf2, sizeof(buf2), _("Hint: %s"), buf1);
        DisplayInformation(buf2);
      } else {
        /* Hint move could not be parsed!? */
        snprintf(buf2, sizeof(buf2),
            _("Illegal hint move \"%s\"\nfrom %s chess program"),
            buf1, _(cps->which));
        DisplayError(buf2, 0);
      }
    } else {
      safeStrCpy(lastHint, buf1, sizeof(lastHint)/sizeof(lastHint[0]));
    }
    return;
  }

  /*
   * Ignore other messages if game is not in progress
   */
  if (gameMode == BeginningOfGame || gameMode == EndOfGame ||
      gameMode == IcsIdle || cps->lastPing != cps->lastPong) return;

  /*
   * look for win, lose, draw, or draw offer
   */
  if (strncmp(message, "1-0", 3) == 0) {
    char *p, *q, *r = "";
    p = strchr(message, '{');
    if (p) {
      q = strchr(p, '}');
      if (q) {
        *q = NULLCHAR;
        r = p + 1;
      }
    }
    GameEnds(WhiteWins, r, GE_ENGINE1 + (cps != &first)); /* [HGM] pass claimer indication for claim test */
    return;
  } else if (strncmp(message, "0-1", 3) == 0) {
    char *p, *q, *r = "";
    p = strchr(message, '{');
    if (p) {
      q = strchr(p, '}');
      if (q) {
        *q = NULLCHAR;
        r = p + 1;
      }
    }
    /* Kludge for Arasan 4.1 bug */
    if (strcmp(r, "Black resigns") == 0) {
      GameEnds(WhiteWins, r, GE_ENGINE1 + (cps != &first));
      return;
    }
    GameEnds(BlackWins, r, GE_ENGINE1 + (cps != &first));
    return;
  } else if (strncmp(message, "1/2", 3) == 0) {
    char *p, *q, *r = "";
    p = strchr(message, '{');
    if (p) {
      q = strchr(p, '}');
      if (q) {
        *q = NULLCHAR;
        r = p + 1;
      }
    }

    GameEnds(GameIsDrawn, r, GE_ENGINE1 + (cps != &first));
    return;

  } else if (strncmp(message, "White resign", 12) == 0) {
    GameEnds(BlackWins, "White resigns", GE_ENGINE1 + (cps != &first));
    return;
  } else if (strncmp(message, "Black resign", 12) == 0) {
    GameEnds(WhiteWins, "Black resigns", GE_ENGINE1 + (cps != &first));
    return;
  } else if (strncmp(message, "White matches", 13) == 0 ||
      strncmp(message, "Black matches", 13) == 0   ) {
    /* [HGM] ignore GNUShogi noises */
    return;
  } else if (strncmp(message, "White", 5) == 0 &&
      message[5] != '(' &&
      StrStr(message, "Black") == NULL) {
    GameEnds(WhiteWins, "White mates", GE_ENGINE1 + (cps != &first));
    return;
  } else if (strncmp(message, "Black", 5) == 0 &&
      message[5] != '(') {
    GameEnds(BlackWins, "Black mates", GE_ENGINE1 + (cps != &first));
    return;
  } else if (strcmp(message, "resign") == 0 ||
      strcmp(message, "computer resigns") == 0) {
    switch (gameMode) {
      case MachinePlaysBlack:
      case IcsPlayingBlack:
        GameEnds(WhiteWins, "Black resigns", GE_ENGINE);
        break;
      case MachinePlaysWhite:
      case IcsPlayingWhite:
        GameEnds(BlackWins, "White resigns", GE_ENGINE);
        break;
      case TwoMachinesPlay:
        if (cps->twoMachinesColor[0] == 'w')
          GameEnds(BlackWins, "White resigns", GE_ENGINE1 + (cps != &first));
        else
          GameEnds(WhiteWins, "Black resigns", GE_ENGINE1 + (cps != &first));
        break;
      default:
        /* can't happen */
        break;
    }
    return;
  } else if (strncmp(message, "opponent mates", 14) == 0) {
    switch (gameMode) {
      case MachinePlaysBlack:
      case IcsPlayingBlack:
        GameEnds(WhiteWins, "White mates", GE_ENGINE);
        break;
      case MachinePlaysWhite:
      case IcsPlayingWhite:
        GameEnds(BlackWins, "Black mates", GE_ENGINE);
        break;
      case TwoMachinesPlay:
        if (cps->twoMachinesColor[0] == 'w')
          GameEnds(BlackWins, "Black mates", GE_ENGINE1 + (cps != &first));
        else
          GameEnds(WhiteWins, "White mates", GE_ENGINE1 + (cps != &first));
        break;
      default:
        /* can't happen */
        break;
    }
    return;
  } else if (strncmp(message, "computer mates", 14) == 0) {
    switch (gameMode) {
      case MachinePlaysBlack:
      case IcsPlayingBlack:
        GameEnds(BlackWins, "Black mates", GE_ENGINE1);
        break;
      case MachinePlaysWhite:
      case IcsPlayingWhite:
        GameEnds(WhiteWins, "White mates", GE_ENGINE);
        break;
      case TwoMachinesPlay:
        if (cps->twoMachinesColor[0] == 'w')
          GameEnds(WhiteWins, "White mates", GE_ENGINE1 + (cps != &first));
        else
          GameEnds(BlackWins, "Black mates", GE_ENGINE1 + (cps != &first));
        break;
      default:
        /* can't happen */
        break;
    }
    return;
  } else if (strncmp(message, "checkmate", 9) == 0) {
    if (WhiteOnMove(forwardMostMove)) {
      GameEnds(BlackWins, "Black mates", GE_ENGINE1 + (cps != &first));
    } else {
      GameEnds(WhiteWins, "White mates", GE_ENGINE1 + (cps != &first));
    }
    return;
  } else if (strstr(message, "Draw") != NULL ||
      strstr(message, "game is a draw") != NULL) {
    GameEnds(GameIsDrawn, "Draw", GE_ENGINE1 + (cps != &first));
    return;
  } else if (strstr(message, "offer") != NULL &&
      strstr(message, "draw") != NULL) {
#if ZIPPY
    if (appData.zippyPlay && first.initDone) {
      /* Relay offer to ICS */
      SendToICS(ics_prefix);
      SendToICS("draw\n");
    }
#endif
    cps->offeredDraw = 2; /* valid until this engine moves twice */
    if (gameMode == TwoMachinesPlay) {
      if (cps->other->offeredDraw) {
        GameEnds(GameIsDrawn, "Draw agreed", GE_XBOARD);
        /* [HGM] in two-machine mode we delay relaying draw offer      */
        /* until after we also have move, to see if it is really claim */
      }
    } else if (gameMode == MachinePlaysWhite ||
        gameMode == MachinePlaysBlack) {
      if (userOfferedDraw) {
        DisplayInformation(_("Machine accepts your draw offer"));
        GameEnds(GameIsDrawn, "Draw agreed", GE_XBOARD);
      } else {
        DisplayInformation(_("Machine offers a draw.\nSelect Action / Draw to accept."));
      }
    }
  }


  /*
   * Look for thinking output
   */
  if ( appData.showThinking // [HGM] thinking: test all options that cause this output
      || !appData.hideThinkingFromHuman || appData.adjudicateLossThreshold != 0 || EngineOutputIsUp()
     ) {
    int plylev, mvleft, mvtot, curscore, time;
    char mvname[MOVE_LEN];
    u64 nodes; // [DM]
    char plyext;
    int ignore = FALSE;
    int prefixHint = FALSE;
    mvname[0] = NULLCHAR;

    switch (gameMode) {
      case MachinePlaysBlack:
      case IcsPlayingBlack:
        if (WhiteOnMove(forwardMostMove)) prefixHint = TRUE;
        break;
      case MachinePlaysWhite:
      case IcsPlayingWhite:
        if (!WhiteOnMove(forwardMostMove)) prefixHint = TRUE;
        break;
      case AnalyzeMode:
      case AnalyzeFile:
        break;
      case IcsObserving: /* [DM] icsEngineAnalyze */
        if (!appData.icsEngineAnalyze) ignore = TRUE;
        break;
      case TwoMachinesPlay:
        if ((cps->twoMachinesColor[0] == 'w') != WhiteOnMove(forwardMostMove)) {
          ignore = TRUE;
        }
        break;
      default:
        ignore = TRUE;
        break;
    }

    if (!ignore) {
      ChessProgramStats tempStats = programStats; // [HGM] info: filter out info lines
      int solved = 0;
      buf1[0] = NULLCHAR;
      if (sscanf(message, "%d%c %d %d " u64Display " %[^\n]\n",
            &plylev, &plyext, &curscore, &time, &nodes, buf1) >= 5) {
        char score_buf[MSG_SIZ];

        if(nodes>>32 == u64Const(0xFFFFFFFF))   // [HGM] negative node count read
          nodes += u64Const(0x100000000);

        if (plyext != ' ' && plyext != '\t') {
          time *= 100;
        }

        /* [AS] Negate score if machine is playing black and reporting absolute scores */
        if( cps->scoreIsAbsolute &&
            ( gameMode == MachinePlaysBlack ||
              gameMode == TwoMachinesPlay && cps->twoMachinesColor[0] == 'b' ||
              gameMode == IcsPlayingBlack ||     // [HGM] also add other situations where engine should report black POV
              (gameMode == AnalyzeMode || gameMode == AnalyzeFile || gameMode == IcsObserving && appData.icsEngineAnalyze) &&
              !WhiteOnMove(currentMove)
            ) )
        {
          curscore = -curscore;
        }

        if(appData.pvSAN[cps==&second]) pv = PvToSAN(buf1);

        if(*bestMove) { // rememer time best EPD move was first found
          int ff1, tf1, fr1, tr1, ff2, tf2, fr2, tr2; char pp1, pp2;
          ChessMove mt; char *p = bestMove;
          int ok = ParseOneMove(pv, forwardMostMove, &mt, &ff2, &fr2, &tf2, &tr2, &pp2);
          solved = 0;
          while(ok && *p && ParseOneMove(p, forwardMostMove, &mt, &ff1, &fr1, &tf1, &tr1, &pp1)) {
            if(ff1==ff2 && fr1==fr2 && tf1==tf2 && tr1==tr2 && pp1==pp2) {
              solvingTime = (solvingTime < 0 ? time : solvingTime);
              solved = 1;
              break;
            }
            while(*p && *p != ' ') p++;
            while(*p == ' ') p++;
          }
          if(!solved) solvingTime = -1;
        }
        if(*avoidMove && !solved) {
          int ff1, tf1, fr1, tr1, ff2, tf2, fr2, tr2; char pp1, pp2;
          ChessMove mt; char *p = avoidMove, solved = 1;
          int ok = ParseOneMove(pv, forwardMostMove, &mt, &ff2, &fr2, &tf2, &tr2, &pp2);
          while(ok && *p && ParseOneMove(p, forwardMostMove, &mt, &ff1, &fr1, &tf1, &tr1, &pp1)) {
            if(ff1==ff2 && fr1==fr2 && tf1==tf2 && tr1==tr2 && pp1==pp2) {
              solved = 0; solvingTime = -2;
              break;
            }
            while(*p && *p != ' ') p++;
            while(*p == ' ') p++;
          }
          if(solved && !*bestMove) solvingTime = (solvingTime < 0 ? time : solvingTime);
        }

        if(serverMoves && (time > 100 || time == 0 && plylev > 7)) {
          char buf[MSG_SIZ];
          FILE *f;
          snprintf(buf, MSG_SIZ, "%s", appData.serverMovesName);
          buf[strlen(buf)-1] = gameMode == MachinePlaysWhite ? 'w' :
            gameMode == MachinePlaysBlack ? 'b' : cps->twoMachinesColor[0];
          if(appData.debugMode) fprintf(debugFP, "write PV on file '%s'\n", buf);
          if(f = fopen(buf, "w")) { // export PV to applicable PV file
            fprintf(f, "%5.2f/%-2d %s", curscore/100., plylev, pv);
            fclose(f);
          }
          else
            /* TRANSLATORS: PV = principal variation, the variation the chess engine thinks is the best for everyone */
            DisplayError(_("failed writing PV"), 0);
        }

        tempStats.depth = plylev;
        tempStats.nodes = nodes;
        tempStats.time = time;
        tempStats.score = curscore;
        tempStats.got_only_move = 0;

        if(cps->nps >= 0) { /* [HGM] nps: use engine nodes or time to decrement clock */
          int ticklen;

          if(cps->nps == 0) ticklen = 10*time;                    // use engine reported time
          else ticklen = (1000. * u64ToDouble(nodes)) / cps->nps; // convert node count to time
          if(WhiteOnMove(forwardMostMove) && (gameMode == MachinePlaysWhite ||
                gameMode == TwoMachinesPlay && cps->twoMachinesColor[0] == 'w'))
            whiteTimeRemaining = timeRemaining[0][forwardMostMove] - ticklen;
          if(!WhiteOnMove(forwardMostMove) && (gameMode == MachinePlaysBlack ||
                gameMode == TwoMachinesPlay && cps->twoMachinesColor[0] == 'b'))
            blackTimeRemaining = timeRemaining[1][forwardMostMove] - ticklen;
        }

        /* Buffer overflow protection */
        if (pv[0] != NULLCHAR) {
          if (strlen(pv) >= sizeof(tempStats.movelist)
              && appData.debugMode) {
            fprintf(debugFP,
                "PV is too long; using the first %u bytes.\n",
                (unsigned) sizeof(tempStats.movelist) - 1);
          }

          safeStrCpy( tempStats.movelist, pv, sizeof(tempStats.movelist)/sizeof(tempStats.movelist[0]) );
        } else {
          sprintf(tempStats.movelist, " no PV\n");
        }

        if (tempStats.seen_stat) {
          tempStats.ok_to_send = 1;
        }

        if (strchr(tempStats.movelist, '(') != NULL) {
          tempStats.line_is_book = 1;
          tempStats.nr_moves = 0;
          tempStats.moves_left = 0;
        } else {
          tempStats.line_is_book = 0;
        }

        if(tempStats.score != 0 || tempStats.nodes != 0 || tempStats.time != 0)
          programStats = tempStats; // [HGM] info: only set stats if genuine PV and not an info line

        SendProgramStatsToFrontend( cps, &tempStats );

        /*
           [AS] Protect the thinkOutput buffer from overflow... this
           is only useful if buf1 hasn't overflowed first!
           */
        if((gameMode == AnalyzeMode && appData.whitePOV || appData.scoreWhite) && !WhiteOnMove(forwardMostMove)) curscore *= -1;
        if(curscore >= MATE_SCORE) 
          snprintf(score_buf, MSG_SIZ, "#%d", curscore - MATE_SCORE);
        else if(curscore <= -MATE_SCORE) 
          snprintf(score_buf, MSG_SIZ, "#%d", curscore + MATE_SCORE);
        else
          snprintf(score_buf, MSG_SIZ, "%+.2f", ((double) curscore) / 100.0);
        snprintf(thinkOutput, sizeof(thinkOutput)/sizeof(thinkOutput[0]), "[%d]%c%s %s%s",
            plylev,
            (gameMode == TwoMachinesPlay ?
             ToUpper(cps->twoMachinesColor[0]) : ' '),
            score_buf,
            prefixHint ? lastHint : "",
            prefixHint ? " " : "" );

        if( buf1[0] != NULLCHAR ) {
          unsigned max_len = sizeof(thinkOutput) - strlen(thinkOutput) - 1;

          if( strlen(pv) > max_len ) {
            if( appData.debugMode) {
              fprintf(debugFP,"PV is too long for thinkOutput, truncating.\n");
            }
            pv[max_len+1] = '\0';
          }

          strcat( thinkOutput, pv);
        }

        if (currentMove == forwardMostMove || gameMode == AnalyzeMode
            || gameMode == AnalyzeFile || appData.icsEngineAnalyze) {
          DisplayMove(currentMove - 1);
        }
        return;

      } else if ((p=StrStr(message, "(only move)")) != NULL) {
        /* crafty (9.25+) says "(only move) <move>"
         * if there is only 1 legal move
         */
        sscanf(p, "(only move) %s", buf1);
        snprintf(thinkOutput, sizeof(thinkOutput)/sizeof(thinkOutput[0]), "%s (only move)", buf1);
        sprintf(programStats.movelist, "%s (only move)", buf1);
        programStats.depth = 1;
        programStats.nr_moves = 1;
        programStats.moves_left = 1;
        programStats.nodes = 1;
        programStats.time = 1;
        programStats.got_only_move = 1;

        /* Not really, but we also use this member to
           mean "line isn't going to change" (Crafty
           isn't searching, so stats won't change) */
        programStats.line_is_book = 1;

        SendProgramStatsToFrontend( cps, &programStats );

        if (currentMove == forwardMostMove || gameMode==AnalyzeMode ||
            gameMode == AnalyzeFile || appData.icsEngineAnalyze) {
          DisplayMove(currentMove - 1);
        }
        return;
      } else if (sscanf(message,"stat01: %d " u64Display " %d %d %d %s",
            &time, &nodes, &plylev, &mvleft,
            &mvtot, mvname) >= 5) {
        /* The stat01: line is from Crafty (9.29+) in response
           to the "." command */
        programStats.seen_stat = 1;
        cps->maybeThinking = TRUE;

        if (programStats.got_only_move || !appData.periodicUpdates)
          return;

        programStats.depth = plylev;
        programStats.time = time;
        programStats.nodes = nodes;
        programStats.moves_left = mvleft;
        programStats.nr_moves = mvtot;
        safeStrCpy(programStats.move_name, mvname, sizeof(programStats.move_name)/sizeof(programStats.move_name[0]));
        programStats.ok_to_send = 1;
        programStats.movelist[0] = '\0';

        SendProgramStatsToFrontend( cps, &programStats );

        return;

      } else if (strncmp(message,"++",2) == 0) {
        /* Crafty 9.29+ outputs this */
        programStats.got_fail = 2;
        return;

      } else if (strncmp(message,"--",2) == 0) {
        /* Crafty 9.29+ outputs this */
        programStats.got_fail = 1;
        return;

      } else if (thinkOutput[0] != NULLCHAR &&
          strncmp(message, "    ", 4) == 0) {
        unsigned message_len;

        p = message;
        while (*p && *p == ' ') p++;

        message_len = strlen( p );

        /* [AS] Avoid buffer overflow */
        if( sizeof(thinkOutput) - strlen(thinkOutput) - 1 > message_len ) {
          strcat(thinkOutput, " ");
          strcat(thinkOutput, p);
        }

        if( sizeof(programStats.movelist) - strlen(programStats.movelist) - 1 > message_len ) {
          strcat(programStats.movelist, " ");
          strcat(programStats.movelist, p);
        }

        if (currentMove == forwardMostMove || gameMode==AnalyzeMode ||
            gameMode == AnalyzeFile || appData.icsEngineAnalyze) {
          DisplayMove(currentMove - 1);
        }
        return;
      }
    }
    else {
      buf1[0] = NULLCHAR;

      if (sscanf(message, "%d%c %d %d " u64Display " %[^\n]\n",
            &plylev, &plyext, &curscore, &time, &nodes, buf1) >= 5)
      {
        ChessProgramStats cpstats;

        if (plyext != ' ' && plyext != '\t') {
          time *= 100;
        }

        /* [AS] Negate score if machine is playing black and reporting absolute scores */
        if( cps->scoreIsAbsolute && ((gameMode == MachinePlaysBlack) || (gameMode == TwoMachinesPlay && cps->twoMachinesColor[0] == 'b')) ) {
          curscore = -curscore;
        }

        cpstats.depth = plylev;
        cpstats.nodes = nodes;
        cpstats.time = time;
        cpstats.score = curscore;
        cpstats.got_only_move = 0;
        cpstats.movelist[0] = '\0';

        if (buf1[0] != NULLCHAR) {
          safeStrCpy( cpstats.movelist, buf1, sizeof(cpstats.movelist)/sizeof(cpstats.movelist[0]) );
        }

        cpstats.ok_to_send = 0;
        cpstats.line_is_book = 0;
        cpstats.nr_moves = 0;
        cpstats.moves_left = 0;

        SendProgramStatsToFrontend( cps, &cpstats );
      }
    }
  }
}


/* Parse a game score from the character string "game", and
   record it as the history of the current game.  The game
   score is NOT assumed to start from the standard position.
   The display is not updated in any way.
   */
void ParseGameHistory (char *game)
{
  ChessMove moveType;
  int fromX, fromY, toX, toY, boardIndex;
  char promoChar;
  char *p, *q;
  char buf[MSG_SIZ];

  if (appData.debugMode)
    fprintf(debugFP, "Parsing game history: %s\n", game);

  if (gameInfo.event == NULL) gameInfo.event = StrSave("ICS game");
  gameInfo.site = StrSave(appData.icsHost);
  gameInfo.date = PGNDate();
  gameInfo.round = StrSave("-");

  /* Parse out names of players */
  while (*game == ' ') game++;
  p = buf;
  while (*game != ' ') *p++ = *game++;
  *p = NULLCHAR;
  gameInfo.white = StrSave(buf);
  while (*game == ' ') game++;
  p = buf;
  while (*game != ' ' && *game != '\n') *p++ = *game++;
  *p = NULLCHAR;
  gameInfo.black = StrSave(buf);

  /* Parse moves */
  boardIndex = blackPlaysFirst ? 1 : 0;
  yynewstr(game);
  for (;;) {
    yyboardindex = boardIndex;
    moveType = (ChessMove) Myylex();
    switch (moveType) {
      case IllegalMove:		/* maybe suicide chess, etc. */
        if (appData.debugMode) {
          fprintf(debugFP, "Illegal move from ICS: '%s'\n", yy_text);
          fprintf(debugFP, "board L=%d, R=%d, H=%d, holdings=%d\n", BOARD_LEFT, BOARD_RGHT, BOARD_HEIGHT, gameInfo.holdingsWidth);
          setbuf(debugFP, NULL);
        }
      case WhitePromotion:
      case BlackPromotion:
      case WhiteNonPromotion:
      case BlackNonPromotion:
      case NormalMove:
      case FirstLeg:
      case WhiteCapturesEnPassant:
      case BlackCapturesEnPassant:
      case WhiteKingSideCastle:
      case WhiteQueenSideCastle:
      case BlackKingSideCastle:
      case BlackQueenSideCastle:
      case WhiteKingSideCastleWild:
      case WhiteQueenSideCastleWild:
      case BlackKingSideCastleWild:
      case BlackQueenSideCastleWild:
        /* PUSH Fabien */
      case WhiteHSideCastleFR:
      case WhiteASideCastleFR:
      case BlackHSideCastleFR:
      case BlackASideCastleFR:
        /* POP Fabien */
        fromX = currentMoveString[0] - AAA;
        fromY = currentMoveString[1] - ONE;
        toX = currentMoveString[2] - AAA;
        toY = currentMoveString[3] - ONE;
        promoChar = currentMoveString[4];
        break;
      case WhiteDrop:
      case BlackDrop:
        if(currentMoveString[0] == '@') continue; // no null moves in ICS mode!
        fromX = moveType == WhiteDrop ?
          (int) CharToPiece(ToUpper(currentMoveString[0])) :
          (int) CharToPiece(ToLower(currentMoveString[0]));
        fromY = DROP_RANK;
        toX = currentMoveString[2] - AAA;
        toY = currentMoveString[3] - ONE;
        promoChar = NULLCHAR;
        break;
      case AmbiguousMove:
        /* bug? */
        snprintf(buf, MSG_SIZ, _("Ambiguous move in ICS output: \"%s\""), yy_text);
        if (appData.debugMode) {
          fprintf(debugFP, "Ambiguous move from ICS: '%s'\n", yy_text);
          fprintf(debugFP, "board L=%d, R=%d, H=%d, holdings=%d\n", BOARD_LEFT, BOARD_RGHT, BOARD_HEIGHT, gameInfo.holdingsWidth);
          setbuf(debugFP, NULL);
        }
        DisplayError(buf, 0);
        return;
      case ImpossibleMove:
        /* bug? */
        snprintf(buf, MSG_SIZ, _("Illegal move in ICS output: \"%s\""), yy_text);
        if (appData.debugMode) {
          fprintf(debugFP, "Impossible move from ICS: '%s'\n", yy_text);
          fprintf(debugFP, "board L=%d, R=%d, H=%d, holdings=%d\n", BOARD_LEFT, BOARD_RGHT, BOARD_HEIGHT, gameInfo.holdingsWidth);
          setbuf(debugFP, NULL);
        }
        DisplayError(buf, 0);
        return;
      case EndOfFile:
        if (boardIndex < backwardMostMove) {
          /* Oops, gap.  How did that happen? */
          DisplayError(_("Gap in move list"), 0);
          return;
        }
        backwardMostMove =  blackPlaysFirst ? 1 : 0;
        if (boardIndex > forwardMostMove) {
          forwardMostMove = boardIndex;
        }
        return;
      case ElapsedTime:
        if (boardIndex > (blackPlaysFirst ? 1 : 0)) {
          strcat(parseList[boardIndex-1], " ");
          strcat(parseList[boardIndex-1], yy_text);
        }
        continue;
      case Comment:
      case PGNTag:
      case NAG:
      default:
        /* ignore */
        continue;
      case WhiteWins:
      case BlackWins:
      case GameIsDrawn:
      case GameUnfinished:
        if (gameMode == IcsExamining) {
          if (boardIndex < backwardMostMove) {
            /* Oops, gap.  How did that happen? */
            return;
          }
          backwardMostMove = blackPlaysFirst ? 1 : 0;
          return;
        }
        gameInfo.result = moveType;
        p = strchr(yy_text, '{');
        if (p == NULL) p = strchr(yy_text, '(');
        if (p == NULL) {
          p = yy_text;
          if (p[0] == '0' || p[0] == '1' || p[0] == '*') p = "";
        } else {
          q = strchr(p, *p == '{' ? '}' : ')');
          if (q != NULL) *q = NULLCHAR;
          p++;
        }
        while(q = strchr(p, '\n')) *q = ' '; // [HGM] crush linefeeds in result message
        gameInfo.resultDetails = StrSave(p);
        continue;
    }
    if (boardIndex >= forwardMostMove &&
        !(gameMode == IcsObserving && ics_gamenum == -1)) {
      backwardMostMove = blackPlaysFirst ? 1 : 0;
      return;
    }
    (void) CoordsToAlgebraic(boards[boardIndex], PosFlags(boardIndex),
        fromY, fromX, toY, toX, promoChar,
        parseList[boardIndex]);
    CopyBoard(boards[boardIndex + 1], boards[boardIndex]);
    /* currentMoveString is set as a side-effect of yylex */
    safeStrCpy(moveList[boardIndex], currentMoveString, sizeof(moveList[boardIndex])/sizeof(moveList[boardIndex][0]));
    strcat(moveList[boardIndex], "\n");
    boardIndex++;
    ApplyMove(fromX, fromY, toX, toY, promoChar, boards[boardIndex]);
    switch (MateTest(boards[boardIndex], PosFlags(boardIndex)) ) {
      case MT_NONE:
      case MT_STALEMATE:
      default:
        break;
      case MT_CHECK:
        if(!IS_SHOGI(gameInfo.variant))
          strcat(parseList[boardIndex - 1], "+");
        break;
      case MT_CHECKMATE:
      case MT_STAINMATE:
        strcat(parseList[boardIndex - 1], "#");
        break;
    }
  }
}


/* Apply a move to the given board  */
void ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
{
  ChessSquare captured = board[toY][toX], piece, pawn, king, killed, killed2; int p, rookX, oldEP, epRank, berolina = 0;
  int promoRank = gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess ? 3 : 1;

  /* [HGM] compute & store e.p. status and castling rights for new position */
  /* we can always do that 'in place', now pointers to these rights are passed to ApplyMove */

  if(gameInfo.variant == VariantBerolina) berolina = EP_BEROLIN_A;
  oldEP = (signed char)board[EP_FILE]; epRank = board[EP_RANK];
  board[EP_STATUS] = EP_NONE;
  board[EP_FILE] = board[EP_RANK] = 100;

  if (fromY == DROP_RANK) {
    /* must be first */
    if(fromX == EmptySquare) { // [HGM] pass: empty drop encodes null move; nothing to change.
      board[EP_STATUS] = EP_CAPTURE; // null move considered irreversible
      return;
    }
    piece = board[toY][toX] = (ChessSquare) fromX;
  } else {
    //      ChessSquare victim;
    int i;

    if( killX >= 0 && killY >= 0 ) { // [HGM] lion: Lion trampled over something
      //           victim = board[killY][killX],
      killed = board[killY][killX],
      board[killY][killX] = EmptySquare,
      board[EP_STATUS] = EP_CAPTURE;
      if( kill2X >= 0 && kill2Y >= 0)
        killed2 = board[kill2Y][kill2X], board[kill2Y][kill2X] = EmptySquare;
    }

    if( board[toY][toX] != EmptySquare ) {
      board[EP_STATUS] = EP_CAPTURE;
      if( (fromX != toX || fromY != toY) && // not igui!
          (captured == WhiteLion && board[fromY][fromX] != BlackLion ||
           captured == BlackLion && board[fromY][fromX] != WhiteLion   ) ) { // [HGM] lion: Chu Lion-capture rules
        board[EP_STATUS] = EP_IRON_LION; // non-Lion x Lion: no counter-strike allowed
      }
    }

    pawn = board[fromY][fromX];
    if( pawn == WhiteLance || pawn == BlackLance ) {
      if( gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu ) {
        if(gameInfo.variant == VariantSpartan) board[EP_STATUS] = EP_PAWN_MOVE; // in Spartan no e.p. rights must be set
        else pawn += WhitePawn - WhiteLance; // Lance is Pawn-like in most variants, so let Pawn code treat it by this kludge
      }
    }
    if( pawn == WhitePawn ) {
      if(fromY != toY) // [HGM] Xiangqi sideway Pawn moves should not count as 50-move breakers
        board[EP_STATUS] = EP_PAWN_MOVE;
      if( toY-fromY>=2) {
        board[EP_FILE] = (fromX + toX)/2; board[EP_RANK] = toY - 1 | 128*(toY - fromY > 2);
        if(toX>BOARD_LEFT   && board[toY][toX-1] == BlackPawn &&
            gameInfo.variant != VariantBerolina || toX < fromX)
          board[EP_STATUS] = toX | berolina;
        if(toX<BOARD_RGHT-1 && board[toY][toX+1] == BlackPawn &&
            gameInfo.variant != VariantBerolina || toX > fromX)
          board[EP_STATUS] = toX;
      }
    } else
      if( pawn == BlackPawn ) {
        if(fromY != toY) // [HGM] Xiangqi sideway Pawn moves should not count as 50-move breakers
          board[EP_STATUS] = EP_PAWN_MOVE;
        if( toY-fromY<= -2) {
          board[EP_FILE] = (fromX + toX)/2; board[EP_RANK] = toY + 1 | 128*(fromY - toY > 2);
          if(toX>BOARD_LEFT   && board[toY][toX-1] == WhitePawn &&
              gameInfo.variant != VariantBerolina || toX < fromX)
            board[EP_STATUS] = toX | berolina;
          if(toX<BOARD_RGHT-1 && board[toY][toX+1] == WhitePawn &&
              gameInfo.variant != VariantBerolina || toX > fromX)
            board[EP_STATUS] = toX;
        }
      }

    if(fromY == 0) board[TOUCHED_W] |= 1<<fromX; else // new way to keep track of virginity
      if(fromY == BOARD_HEIGHT-1) board[TOUCHED_B] |= 1<<fromX;
    if(toY == 0) board[TOUCHED_W] |= 1<<toX; else
      if(toY == BOARD_HEIGHT-1) board[TOUCHED_B] |= 1<<toX;

    for(i=0; i<nrCastlingRights; i++) {
      if(board[CASTLING][i] == fromX && castlingRank[i] == fromY ||
          board[CASTLING][i] == toX   && castlingRank[i] == toY
        ) board[CASTLING][i] = NoRights; // revoke for moved or captured piece
    }

    if(gameInfo.variant == VariantSChess) { // update virginity
      if(fromY == 0)              board[VIRGIN][fromX] &= ~VIRGIN_W; // loss by moving
      if(fromY == BOARD_HEIGHT-1) board[VIRGIN][fromX] &= ~VIRGIN_B;
      if(toY == 0)                board[VIRGIN][toX]   &= ~VIRGIN_W; // loss by capture
      if(toY == BOARD_HEIGHT-1)   board[VIRGIN][toX]   &= ~VIRGIN_B;
    }

    if (fromX == toX && fromY == toY && killX < 0) return;

    piece = board[fromY][fromX]; /* [HGM] remember, for Shogi promotion */
    king = piece < (int) BlackPawn ? WhiteKing : BlackKing; /* [HGM] Knightmate simplify testing for castling */
    if(gameInfo.variant == VariantKnightmate)
      king += (int) WhiteUnicorn - (int) WhiteKing;

    if(pieceDesc[piece] && killX >= 0 && strchr(pieceDesc[piece], 'O') // Betza castling-enabled
        && (piece < BlackPawn ? killed < BlackPawn : killed >= BlackPawn)) {    // and tramples own
      board[toY][toX] = piece; board[fromY][fromX] = EmptySquare;
      board[toY][toX + (killX < fromX ? 1 : -1)] = killed;
      board[EP_STATUS] = EP_NONE; // capture was fake!
    } else
      if(nrCastlingRights == 0 && board[toY][toX] < EmptySquare && (piece < BlackPawn) == (board[toY][toX] < BlackPawn)) {
        board[fromY][fromX] = board[toY][toX]; // capture own will lead to swapping
        board[toY][toX] = piece;
        board[EP_STATUS] = EP_NONE; // capture was fake!
      } else
        /* Code added by Tord: */
        /* FRC castling assumed when king captures friendly rook. [HGM] or RxK for S-Chess */
        if (board[fromY][fromX] == WhiteKing && board[toY][toX] == WhiteRook ||
            board[fromY][fromX] == WhiteRook && board[toY][toX] == WhiteKing) {
          board[EP_STATUS] = EP_NONE; // capture was fake!
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = EmptySquare;
          if((toX > fromX) != (piece == WhiteRook)) {
            board[0][BOARD_RGHT-2] = WhiteKing; board[0][BOARD_RGHT-3] = WhiteRook;
          } else {
            board[0][BOARD_LEFT+2] = WhiteKing; board[0][BOARD_LEFT+3] = WhiteRook;
          }
        } else if (board[fromY][fromX] == BlackKing && board[toY][toX] == BlackRook ||
            board[fromY][fromX] == BlackRook && board[toY][toX] == BlackKing) {
          board[EP_STATUS] = EP_NONE;
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = EmptySquare;
          if((toX > fromX) != (piece == BlackRook)) {
            board[BOARD_HEIGHT-1][BOARD_RGHT-2] = BlackKing; board[BOARD_HEIGHT-1][BOARD_RGHT-3] = BlackRook;
          } else {
            board[BOARD_HEIGHT-1][BOARD_LEFT+2] = BlackKing; board[BOARD_HEIGHT-1][BOARD_LEFT+3] = BlackRook;
          }
          /* End of code added by Tord */

        } else if (pieceDesc[piece] && piece == king && !strchr(pieceDesc[piece], 'O') && strchr(pieceDesc[piece], 'i')) {
          board[fromY][fromX] = EmptySquare; // never castle if King has virgin moves defined on it other than castling
          board[toY][toX] = piece;
        } else if (board[fromY][fromX] == king
            && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1 // [HGM] cylinder */
            && toY == fromY && toX > fromX+1) {
          for(rookX=fromX+1; board[toY][rookX] == EmptySquare && rookX < BOARD_RGHT-1; rookX++)
            ; // castle with nearest piece
          board[fromY][toX-1] = board[fromY][rookX];
          board[fromY][rookX] = EmptySquare;
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = king;
        } else if (board[fromY][fromX] == king
            && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1 // [HGM] cylinder */
            && toY == fromY && toX < fromX-1) {
          for(rookX=fromX-1; board[toY][rookX] == EmptySquare && rookX > 0; rookX--)
            ; // castle with nearest piece
          board[fromY][toX+1] = board[fromY][rookX];
          board[fromY][rookX] = EmptySquare;
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = king;
        } else if ((board[fromY][fromX] == WhitePawn && gameInfo.variant != VariantXiangqi ||
              board[fromY][fromX] == WhiteLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu)
            && toY >= BOARD_HEIGHT-promoRank && promoChar // defaulting to Q is done elsewhere
            ) {
          /* white pawn promotion */
          board[toY][toX] = CharToPiece(ToUpper(promoChar));
          if(board[toY][toX] < WhiteCannon && PieceToChar(PROMOTED(board[toY][toX])) == '~') /* [HGM] use shadow piece (if available) */
            board[toY][toX] = (ChessSquare) (PROMOTED(board[toY][toX]));
          board[fromY][fromX] = EmptySquare;
        } else if ((fromY >= BOARD_HEIGHT>>1)
            && (oldEP == toX || oldEP == EP_UNKNOWN || appData.testLegality || abs(toX - fromX) > 4)
            && (toX != fromX)
            && gameInfo.variant != VariantXiangqi
            && gameInfo.variant != VariantBerolina
            && (pawn == WhitePawn)
            && (board[toY][toX] == EmptySquare)) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = piece;
          if(toY == epRank - 128 + 1)
            captured = board[toY - 2][toX], board[toY - 2][toX] = EmptySquare;
          else
            captured = board[toY - 1][toX], board[toY - 1][toX] = EmptySquare;
        } else if ((fromY == BOARD_HEIGHT-4)
            && (toX == fromX)
            && gameInfo.variant == VariantBerolina
            && (board[fromY][fromX] == WhitePawn)
            && (board[toY][toX] == EmptySquare)) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = WhitePawn;
          if(oldEP & EP_BEROLIN_A) {
            captured = board[fromY][fromX-1];
            board[fromY][fromX-1] = EmptySquare;
          }else{	captured = board[fromY][fromX+1];
            board[fromY][fromX+1] = EmptySquare;
          }
        } else if (board[fromY][fromX] == king
            && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1 // [HGM] cylinder */
            && toY == fromY && toX > fromX+1) {
          for(rookX=toX+1; board[toY][rookX] == EmptySquare && rookX < BOARD_RGHT - 1; rookX++)
            ;
          board[fromY][toX-1] = board[fromY][rookX];
          board[fromY][rookX] = EmptySquare;
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = king;
        } else if (board[fromY][fromX] == king
            && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1 // [HGM] cylinder */
            && toY == fromY && toX < fromX-1) {
          for(rookX=toX-1; board[toY][rookX] == EmptySquare && rookX > 0; rookX--)
            ;
          board[fromY][toX+1] = board[fromY][rookX];
          board[fromY][rookX] = EmptySquare;
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = king;
        } else if (fromY == 7 && fromX == 3
            && board[fromY][fromX] == BlackKing
            && toY == 7 && toX == 5) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = BlackKing;
          board[fromY][7] = EmptySquare;
          board[toY][4] = BlackRook;
        } else if (fromY == 7 && fromX == 3
            && board[fromY][fromX] == BlackKing
            && toY == 7 && toX == 1) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = BlackKing;
          board[fromY][0] = EmptySquare;
          board[toY][2] = BlackRook;
        } else if ((board[fromY][fromX] == BlackPawn && gameInfo.variant != VariantXiangqi ||
              board[fromY][fromX] == BlackLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu)
            && toY < promoRank && promoChar
            ) {
          /* black pawn promotion */
          board[toY][toX] = CharToPiece(ToLower(promoChar));
          if(board[toY][toX] < BlackCannon && PieceToChar(PROMOTED(board[toY][toX])) == '~') /* [HGM] use shadow piece (if available) */
            board[toY][toX] = (ChessSquare) (PROMOTED(board[toY][toX]));
          board[fromY][fromX] = EmptySquare;
        } else if ((fromY < BOARD_HEIGHT>>1)
            && (oldEP == toX || oldEP == EP_UNKNOWN || appData.testLegality || abs(toX - fromX) > 4)
            && (toX != fromX)
            && gameInfo.variant != VariantXiangqi
            && gameInfo.variant != VariantBerolina
            && (pawn == BlackPawn)
            && (board[toY][toX] == EmptySquare)) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = piece;
          if(toY == epRank - 128 - 1)
            captured = board[toY + 2][toX], board[toY + 2][toX] = EmptySquare;
          else
            captured = board[toY + 1][toX], board[toY + 1][toX] = EmptySquare;
        } else if ((fromY == 3)
            && (toX == fromX)
            && gameInfo.variant == VariantBerolina
            && (board[fromY][fromX] == BlackPawn)
            && (board[toY][toX] == EmptySquare)) {
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = BlackPawn;
          if(oldEP & EP_BEROLIN_A) {
            captured = board[fromY][fromX-1];
            board[fromY][fromX-1] = EmptySquare;
          }else{	captured = board[fromY][fromX+1];
            board[fromY][fromX+1] = EmptySquare;
          }
        } else {
          ChessSquare piece = board[fromY][fromX]; // [HGM] lion: allow for igui (where from == to)
          board[fromY][fromX] = EmptySquare;
          board[toY][toX] = piece;
        }
  }

  if (gameInfo.holdingsWidth != 0) {

    /* !!A lot more code needs to be written to support holdings  */
    /* [HGM] OK, so I have written it. Holdings are stored in the */
    /* penultimate board files, so they are automaticlly stored   */
    /* in the game history.                                       */
    if (fromY == DROP_RANK || gameInfo.variant == VariantSChess
        && promoChar && piece != WhitePawn && piece != BlackPawn) {
      /* Delete from holdings, by decreasing count */
      /* and erasing image if necessary            */
      p = fromY == DROP_RANK ? (int) fromX : CharToPiece(piece > BlackPawn ? ToLower(promoChar) : ToUpper(promoChar));
      if(p < (int) BlackPawn) { /* white drop */
        p -= (int)WhitePawn;
        p = PieceToNumber((ChessSquare)p);
        if(p >= gameInfo.holdingsSize) p = 0;
        if(--board[p][BOARD_WIDTH-2] <= 0)
          board[p][BOARD_WIDTH-1] = EmptySquare;
        if((int)board[p][BOARD_WIDTH-2] < 0)
          board[p][BOARD_WIDTH-2] = 0;
      } else {                  /* black drop */
        p -= (int)BlackPawn;
        p = PieceToNumber((ChessSquare)p);
        if(p >= gameInfo.holdingsSize) p = 0;
        if(--board[BOARD_HEIGHT-1-p][1] <= 0)
          board[BOARD_HEIGHT-1-p][0] = EmptySquare;
        if((int)board[BOARD_HEIGHT-1-p][1] < 0)
          board[BOARD_HEIGHT-1-p][1] = 0;
      }
    }
    if (captured != EmptySquare && gameInfo.holdingsSize > 0
        && gameInfo.variant != VariantBughouse && gameInfo.variant != VariantSChess        ) {
      /* [HGM] holdings: Add to holdings, if holdings exist */
      if(gameInfo.variant == VariantSuper || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand) {
        // [HGM] superchess: suppress flipping color of captured pieces by reverse pre-flip
        captured = (int) captured >= (int) BlackPawn ? BLACK_TO_WHITE captured : WHITE_TO_BLACK captured;
      }
      p = (int) captured;
      if (p >= (int) BlackPawn) {
        p -= (int)BlackPawn;
        if(DEMOTED(p) >= 0 && PieceToChar(p) == '+') {
          /* Restore shogi-promoted piece to its original  first */
          captured = (ChessSquare) (DEMOTED(captured));
          p = DEMOTED(p);
        }
        p = PieceToNumber((ChessSquare)p);
        if(p >= gameInfo.holdingsSize) { p = 0; captured = BlackPawn; }
        board[p][BOARD_WIDTH-2]++;
        board[p][BOARD_WIDTH-1] = BLACK_TO_WHITE captured;
      } else {
        p -= (int)WhitePawn;
        if(DEMOTED(p) >= 0 && PieceToChar(p) == '+') {
          captured = (ChessSquare) (DEMOTED(captured));
          p = DEMOTED(p);
        }
        p = PieceToNumber((ChessSquare)p);
        if(p >= gameInfo.holdingsSize) { p = 0; captured = WhitePawn; }
        board[BOARD_HEIGHT-1-p][1]++;
        board[BOARD_HEIGHT-1-p][0] = WHITE_TO_BLACK captured;
      }
    }
  } else if (gameInfo.variant == VariantAtomic) {
    if (captured != EmptySquare) {
      int y, x;
      for (y = toY-1; y <= toY+1; y++) {
        for (x = toX-1; x <= toX+1; x++) {
          if (y >= 0 && y < BOARD_HEIGHT && x >= BOARD_LEFT && x < BOARD_RGHT &&
              board[y][x] != WhitePawn && board[y][x] != BlackPawn) {
            board[y][x] = EmptySquare;
          }
        }
      }
      board[toY][toX] = EmptySquare;
    }
  }

  if(gameInfo.variant == VariantSChess && promoChar != NULLCHAR && promoChar != '=' && piece != WhitePawn && piece != BlackPawn) {
    board[fromY][fromX] = CharToPiece(piece < BlackPawn ? ToUpper(promoChar) : ToLower(promoChar)); // S-Chess gating
  } else
    if(promoChar == '+') {
      /* [HGM] Shogi-style promotions, to piece implied by original (Might overwrite ordinary Pawn promotion) */
      board[toY][toX] = (ChessSquare) (CHUPROMOTED(piece));
      if(gameInfo.variant == VariantChuChess && (piece == WhiteKnight || piece == BlackKnight))
        board[toY][toX] = piece + WhiteLion - WhiteKnight; // adjust Knight promotions to Lion
    } else if(!appData.testLegality && promoChar != NULLCHAR && promoChar != '=') { // without legality testing, unconditionally believe promoChar
      ChessSquare newPiece = CharToPiece(piece < BlackPawn ? ToUpper(promoChar) : ToLower(promoChar));
      if((newPiece <= WhiteMan || newPiece >= BlackPawn && newPiece <= BlackMan)  // unpromoted piece specified
          && pieceToChar[PROMOTED(newPiece)] == '~') newPiece = PROMOTED(newPiece);// but promoted version available
      board[toY][toX] = newPiece;
    }
  if((gameInfo.variant == VariantSuper || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand)
      && promoChar != NULLCHAR && gameInfo.holdingsSize) {
    // [HGM] superchess: take promotion piece out of holdings
    int k = PieceToNumber(CharToPiece(ToUpper(promoChar)));
    if((int)piece < (int)BlackPawn) { // determine stm from piece color
      if(!--board[k][BOARD_WIDTH-2])
        board[k][BOARD_WIDTH-1] = EmptySquare;
    } else {
      if(!--board[BOARD_HEIGHT-1-k][1])
        board[BOARD_HEIGHT-1-k][0] = EmptySquare;
    }
  }
}

/* Updates forwardMostMove */
void MakeMove (int fromX, int fromY, int toX, int toY, int promoChar)
{
  int x = toX, y = toY;
  char *s = parseList[forwardMostMove];
  ChessSquare p = boards[forwardMostMove][toY][toX];
  //    forwardMostMove++; // [HGM] bare: moved downstream

  if(kill2X >= 0) x = kill2X, y = kill2Y; else
    if(killX >= 0 && killY >= 0) x = killX, y = killY; // [HGM] lion: make SAN move to intermediate square, if there is one
  (void) CoordsToAlgebraic(boards[forwardMostMove],
      PosFlags(forwardMostMove),
      fromY, fromX, y, x, (killX < 0)*promoChar,
      s);
  if(kill2X >= 0 && kill2Y >= 0)
    sprintf(s + strlen(s), "x%c%d", killX + AAA, killY + ONE - '0'); // 2nd leg of 3-leg move is always capture
  if(killX >= 0 && killY >= 0)
    sprintf(s + strlen(s), "%c%c%d%c", p == EmptySquare || toX == fromX && toY == fromY || toX== kill2X && toY == kill2Y ? '-' : 'x',
        toX + AAA, toY + ONE - '0', promoChar);

  if(serverMoves != NULL) { /* [HGM] write moves on file for broadcasting (should be separate routine, really) */
    int timeLeft; static int lastLoadFlag=0; int king, piece;
    piece = boards[forwardMostMove][fromY][fromX];
    king = piece < (int) BlackPawn ? WhiteKing : BlackKing;
    if(gameInfo.variant == VariantKnightmate)
      king += (int) WhiteUnicorn - (int) WhiteKing;
    if(forwardMostMove == 0) {
      if(gameMode == MachinePlaysBlack || gameMode == BeginningOfGame)
        fprintf(serverMoves, "%s;", UserName());
      else if(gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'b')
        fprintf(serverMoves, "%s;", second.tidy);
      fprintf(serverMoves, "%s;", first.tidy);
      if(gameMode == MachinePlaysWhite)
        fprintf(serverMoves, "%s;", UserName());
      else if(gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'w')
        fprintf(serverMoves, "%s;", second.tidy);
    } else fprintf(serverMoves, loadFlag|lastLoadFlag ? ":" : ";");
    lastLoadFlag = loadFlag;
    // print base move
    fprintf(serverMoves, "%c%c:%c%c", AAA+fromX, ONE+fromY, AAA+toX, ONE+toY);
    // print castling suffix
    if( toY == fromY && piece == king ) {
      if(toX-fromX > 1)
        fprintf(serverMoves, ":%c%c:%c%c", AAA+BOARD_RGHT-1, ONE+fromY, AAA+toX-1,ONE+toY);
      if(fromX-toX >1)
        fprintf(serverMoves, ":%c%c:%c%c", AAA+BOARD_LEFT, ONE+fromY, AAA+toX+1,ONE+toY);
    }
    // e.p. suffix
    if( (boards[forwardMostMove][fromY][fromX] == WhitePawn ||
          boards[forwardMostMove][fromY][fromX] == BlackPawn   ) &&
        boards[forwardMostMove][toY][toX] == EmptySquare
        && fromX != toX && fromY != toY)
      fprintf(serverMoves, ":%c%c:%c%c", AAA+fromX, ONE+fromY, AAA+toX, ONE+fromY);
    // promotion suffix
    if(promoChar != NULLCHAR) {
      if(fromY == 0 || fromY == BOARD_HEIGHT-1)
        fprintf(serverMoves, ":%c%c:%c%c", WhiteOnMove(forwardMostMove) ? 'w' : 'b',
            ToLower(promoChar), AAA+fromX, ONE+fromY); // Seirawan gating
      else fprintf(serverMoves, ":%c:%c%c", ToLower(promoChar), AAA+toX, ONE+toY);
    }
    if(!loadFlag) {
      char buf[MOVE_LEN*2], *p; int len;
      fprintf(serverMoves, "/%d/%d",
          pvInfoList[forwardMostMove].depth, pvInfoList[forwardMostMove].score);
      if(forwardMostMove+1 & 1) timeLeft = whiteTimeRemaining/1000;
      else                      timeLeft = blackTimeRemaining/1000;
      fprintf(serverMoves, "/%d", timeLeft);
      strncpy(buf, parseList[forwardMostMove], MOVE_LEN*2);
      if(p = strchr(buf, '/')) *p = NULLCHAR; else
        if(p = strchr(buf, '=')) *p = NULLCHAR;
      len = strlen(buf); if(len > 1 && buf[len-2] != '-') buf[len-2] = NULLCHAR; // strip to-square
      fprintf(serverMoves, "/%s", buf);
    }
    fflush(serverMoves);
  }

  if (forwardMostMove+1 > framePtr) { // [HGM] vari: do not run into saved variations..
    GameEnds(GameUnfinished, _("Game too long; increase MAX_MOVES and recompile"), GE_XBOARD);
    return;
  }
  UnLoadPV(); // [HGM] pv: if we are looking at a PV, abort this
  if (commentList[forwardMostMove+1] != NULL) {
    free(commentList[forwardMostMove+1]);
    commentList[forwardMostMove+1] = NULL;
  }
  CopyBoard(boards[forwardMostMove+1], boards[forwardMostMove]);
  ApplyMove(fromX, fromY, toX, toY, promoChar, boards[forwardMostMove+1]);
  // forwardMostMove++; // [HGM] bare: moved to after ApplyMove, to make sure clock interrupt finds complete board
  SwitchClocks(forwardMostMove+1); // [HGM] race: incrementing move nr inside
  timeRemaining[0][forwardMostMove] = whiteTimeRemaining;
  timeRemaining[1][forwardMostMove] = blackTimeRemaining;
  adjustedClock = FALSE;
  gameInfo.result = GameUnfinished;
  if (gameInfo.resultDetails != NULL) {
    free(gameInfo.resultDetails);
    gameInfo.resultDetails = NULL;
  }
  CoordsToComputerAlgebraic(fromY, fromX, toY, toX, promoChar,
      moveList[forwardMostMove - 1]);
  switch (MateTest(boards[forwardMostMove], PosFlags(forwardMostMove)) ) {
    case MT_NONE:
    case MT_STALEMATE:
    default:
      break;
    case MT_CHECK:
      if(!IS_SHOGI(gameInfo.variant))
        strcat(parseList[forwardMostMove - 1], "+");
      break;
    case MT_CHECKMATE:
    case MT_STAINMATE:
      strcat(parseList[forwardMostMove - 1], "#");
      break;
  }
}

/* Updates currentMove if not pausing */
void ShowMove (int fromX, int fromY, int toX, int toY)
{
  int instant = (gameMode == PlayFromGameFile) ?
    (matchMode || (appData.timeDelay == 0 && !pausing)) : pausing;
  if(appData.noGUI) return;
  if (!pausing || gameMode == PlayFromGameFile || gameMode == AnalyzeFile) {
    if (!instant) {
      if (forwardMostMove == currentMove + 1) {
        AnimateMove(boards[forwardMostMove - 1],
            fromX, fromY, toX, toY);
      }
    }
    currentMove = forwardMostMove;
  }

  killX = killY = kill2X = kill2Y = -1; // [HGM] lion: used up

  if (instant) return;

  DisplayMove(currentMove - 1);
  if (!pausing || gameMode == PlayFromGameFile || gameMode == AnalyzeFile) {
    if (appData.highlightLastMove) { // [HGM] moved to after DrawPosition, as with arrow it could redraw old board
      SetHighlights(fromX, fromY, toX, toY);
    }
  }
  DrawPosition(FALSE, boards[currentMove]);
  DisplayBothClocks();
  HistorySet(parseList,backwardMostMove,forwardMostMove,currentMove-1);
}

void SendEgtPath (ChessProgramState *cps)
{       /* [HGM] EGT: match formats given in feature with those given by user, and send info for each match */
  char buf[MSG_SIZ], name[MSG_SIZ], *p;

  if((p = cps->egtFormats) == NULL || appData.egtFormats == NULL) return;

  while(*p) {
    char c, *q = name+1, *r, *s;

    name[0] = ','; // extract next format name from feature and copy with prefixed ','
    while(*p && *p != ',') *q++ = *p++;
    *q++ = ':'; *q = 0;
    if( appData.defaultPathEGTB && appData.defaultPathEGTB[0] &&
        strcmp(name, ",nalimov:") == 0 ) {
      // take nalimov path from the menu-changeable option first, if it is defined
      snprintf(buf, MSG_SIZ, "egtpath nalimov %s\n", appData.defaultPathEGTB);
      SendToProgram(buf,cps);     // send egtbpath command for nalimov
    } else
      if( (s = StrStr(appData.egtFormats, name+1)) == appData.egtFormats ||
          (s = StrStr(appData.egtFormats, name)) != NULL) {
        // format name occurs amongst user-supplied formats, at beginning or immediately after comma
        s = r = StrStr(s, ":") + 1; // beginning of path info
        while(*r && *r != ',') r++; // path info is everything upto next ';' or end of string
        c = *r; *r = 0;             // temporarily null-terminate path info
        *--q = 0;               // strip of trailig ':' from name
        snprintf(buf, MSG_SIZ, "egtpath %s %s\n", name+1, s);
        *r = c;
        SendToProgram(buf,cps);     // send egtbpath command for this format
      }
    if(*p == ',') p++; // read away comma to position for next format name
  }
}

static int NonStandardBoardSize (VariantClass v, int boardWidth, int boardHeight, int holdingsSize)
{
  int width = 8, height = 8, holdings = 0;             // most common sizes
  if( v == VariantUnknown || *engineVariant) return 0; // engine-defined name never needs prefix
  // correct the deviations default for each variant
  if( v == VariantXiangqi ) width = 9,  height = 10;
  if( v == VariantShogi )   width = 9,  height = 9,  holdings = 7;
  if( v == VariantBughouse || v == VariantCrazyhouse) holdings = 5;
  if( v == VariantCapablanca || v == VariantCapaRandom ||
      v == VariantGothic || v == VariantFalcon || v == VariantJanus )
    width = 10;
  if( v == VariantCourier ) width = 12;
  if( v == VariantSuper )                            holdings = 8;
  if( v == VariantGreat )   width = 10,              holdings = 8;
  if( v == VariantSChess )                           holdings = 7;
  if( v == VariantGrand )   width = 10, height = 10, holdings = 7;
  if( v == VariantChuChess) width = 10, height = 10;
  if( v == VariantChu )     width = 12, height = 12;
  return boardWidth >= 0   && boardWidth   != width  || // -1 is default,
         boardHeight >= 0  && boardHeight  != height || // and thus by definition OK
           holdingsSize >= 0 && holdingsSize != holdings;
}

char variantError[MSG_SIZ];

char * SupportedVariant (char *list, VariantClass v, int boardWidth, int boardHeight, int holdingsSize, int proto, char *engine)
{     // returns error message (recognizable by upper-case) if engine does not support the variant
  char *p, *variant = VariantName(v);
  static char b[MSG_SIZ];
  if(NonStandardBoardSize(v, boardWidth, boardHeight, holdingsSize)) { /* [HGM] make prefix for non-standard board size. */
    snprintf(b, MSG_SIZ, "%dx%d+%d_%s", boardWidth, boardHeight,
        holdingsSize, variant); // cook up sized variant name
    /* [HGM] varsize: try first if this deviant size variant is specifically known */
    if(StrStr(list, b) == NULL) {
      // specific sized variant not known, check if general sizing allowed
      if(proto != 1 && StrStr(list, "boardsize") == NULL) {
        snprintf(variantError, MSG_SIZ, "Board size %dx%d+%d not supported by %s",
            boardWidth, boardHeight, holdingsSize, engine);
        return NULL;
      }
      /* [HGM] here we really should compare with the maximum supported board size */
    }
  } else snprintf(b, MSG_SIZ,"%s", variant);
  if(proto == 1) return b; // for protocol 1 we cannot check and hope for the best
  p = StrStr(list, b);
  while(p && (p != list && p[-1] != ',' || p[strlen(b)] && p[strlen(b)] != ',') ) p = StrStr(p+1, b);
  if(p == NULL) {
    // occurs not at all in list, or only as sub-string
    snprintf(variantError, MSG_SIZ, _("Variant %s not supported by %s"), b, engine);
    if(p = StrStr(list, b)) { // handle requesting parent variant when only size-overridden is supported
      int l = strlen(variantError);
      char *q;
      while(p != list && p[-1] != ',') p--;
      q = strchr(p, ',');
      if(q) *q = NULLCHAR;
      snprintf(variantError + l, MSG_SIZ - l,  _(", but %s is"), p);
      if(q) *q= ',';
    }
    return NULL;
  }
  return b;
}

void InitChessProgram (ChessProgramState *cps, int setup)
  /* setup needed to setup FRC opening position */
{
  char buf[MSG_SIZ], *b;
  if (appData.noChessProgram) return;
  hintRequested = FALSE;
  bookRequested = FALSE;

  ParseFeatures(appData.features[cps == &second], cps); // [HGM] allow user to overrule features
  /* [HGM] some new WB protocol commands to configure engine are sent now, if engine supports them */
  /*       moved to before sending initstring in 4.3.15, so Polyglot can delay UCI 'isready' to recepton of 'new' */
  if(cps->memSize) { /* [HGM] memory */
    snprintf(buf, MSG_SIZ, "memory %d\n", appData.defaultHashSize + appData.defaultCacheSizeEGTB);
    SendToProgram(buf, cps);
  }
  SendEgtPath(cps); /* [HGM] EGT */
  if(cps->maxCores) { /* [HGM] SMP: (protocol specified must be last settings command before new!) */
    snprintf(buf, MSG_SIZ, "cores %d\n", appData.smpCores);
    SendToProgram(buf, cps);
  }

  setboardSpoiledMachineBlack = FALSE;
  SendToProgram(cps->initString, cps);
  if ( // gameInfo.variant != VariantNormal &&
      gameInfo.variant != VariantLoadable
      /* [HGM] also send variant if board size non-standard */
      || gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0) {

    b = SupportedVariant(cps->variants, gameInfo.variant, gameInfo.boardWidth,
        gameInfo.boardHeight, gameInfo.holdingsSize, cps->protocolVersion, cps->tidy);

    if (b == NULL) {
      VariantClass v;
      char c, *q = cps->variants, *p = strchr(q, ',');
      if(p) *p = NULLCHAR;
      v = StringToVariant(q);
      DisplayError(variantError, 0);
      if(v != VariantUnknown && cps == &first) {
        int w, h, s;
        if(sscanf(q, "%dx%d+%d_%c", &w, &h, &s, &c) == 4) // get size overrides the engine needs with it (if any)
          appData.NrFiles = w, appData.NrRanks = h, appData.holdingsSize = s, q = strchr(q, '_') + 1;
        ASSIGN(appData.variant, q);
        Reset(TRUE, FALSE);
      }
      if(p) *p = ',';
      return;
    }

    snprintf(buf, MSG_SIZ, "variant %s\n", b);
    SendToProgram(buf, cps);
  }
  currentlyInitializedVariant = gameInfo.variant;

  /* [HGM] send opening position in FRC to first engine */
  if(setup) {
    SendToProgram("force\n", cps);
    SendBoard(cps, 0);
    /* engine is now in force mode! Set flag to wake it up after first move. */
    setboardSpoiledMachineBlack = 1;
  }

  if (cps->sendICS) {
    snprintf(buf, sizeof(buf), "ics %s\n", appData.icsActive ? appData.icsHost : "-");
    SendToProgram(buf, cps);
  }
  cps->maybeThinking = FALSE;
  cps->offeredDraw = 0;
  if (!appData.icsActive) {
    SendTimeControl(cps, movesPerSession, timeControl,
        timeIncrement, appData.searchDepth,
        searchTime);
  }
  if (appData.showThinking
      // [HGM] thinking: four options require thinking output to be sent
      || !appData.hideThinkingFromHuman || appData.adjudicateLossThreshold != 0 || EngineOutputIsUp()
     ) {
    SendToProgram("post\n", cps);
  }
  SendToProgram("hard\n", cps);
  if (!appData.ponderNextMove) {
    /* Warning: "easy" is a toggle in GNU Chess, so don't send
       it without being sure what state we are in first.  "hard"
       is not a toggle, so that one is OK.
       */
    SendToProgram("easy\n", cps);
  }
  if (cps->usePing) {
    snprintf(buf, MSG_SIZ, "ping %d\n", initPing = ++cps->lastPing);
    SendToProgram(buf, cps);
  }
  cps->initDone = TRUE;
  ClearEngineOutputPane(cps == &second);
}


void ResendOptions (ChessProgramState *cps)
{ // send the stored value of the options
  int i;
  char buf[MSG_SIZ];
  Option *opt = cps->option;
  for(i=0; i<cps->nrOptions; i++, opt++) {
    switch(opt->type) {
      case Spin:
      case Slider:
      case CheckBox:
        snprintf(buf, MSG_SIZ, "option %s=%d\n", opt->name, opt->value);
        break;
      case ComboBox:
        snprintf(buf, MSG_SIZ, "option %s=%s\n", opt->name, opt->choice[opt->value]);
        break;
      default:
        snprintf(buf, MSG_SIZ, "option %s=%s\n", opt->name, opt->textValue);
        break;
      case Button:
      case SaveButton:
        continue;
    }
    SendToProgram(buf, cps);
  }
}

void StartChessProgram (ChessProgramState *cps)
{
  char buf[MSG_SIZ];
  int err;

  if (appData.noChessProgram) return;
  cps->initDone = FALSE;

  if (strcmp(cps->host, "localhost") == 0) {
    err = StartChildProcess(cps->program, cps->dir, &cps->pr);
  } else if (*appData.remoteShell == NULLCHAR) {
    err = OpenRcmd(cps->host, appData.remoteUser, cps->program, &cps->pr);
  } else {
    if (*appData.remoteUser == NULLCHAR) {
      snprintf(buf, sizeof(buf), "%s %s %s", appData.remoteShell, cps->host,
          cps->program);
    } else {
      snprintf(buf, sizeof(buf), "%s %s -l %s %s", appData.remoteShell,
          cps->host, appData.remoteUser, cps->program);
    }
    err = StartChildProcess(buf, "", &cps->pr);
  }

  if (err != 0) {
    snprintf(buf, MSG_SIZ, _("Startup failure on '%s'"), cps->program);
    DisplayError(buf, err); // [HGM] bit of a rough kludge: ignore failure, (which XBoard would do anyway), and let I/O discover it
    if(cps != &first) return;
    appData.noChessProgram = TRUE;
    ThawUI();
    SetNCPMode();
    //	DisplayFatalError(buf, err, 1);
    //	cps->pr = NoProc;
    //	cps->isr = NULL;
    return;
  }

  cps->isr = AddInputSource(cps->pr, TRUE, ReceiveFromProgram, cps);
  if (cps->protocolVersion > 1) {
    snprintf(buf, MSG_SIZ, "xboard\nprotover %d\n", cps->protocolVersion);
    if(!cps->reload) { // do not clear options when reloading because of -xreuse
      cps->nrOptions = 0; // [HGM] options: clear all engine-specific options
      cps->comboCnt = 0;  //                and values of combo boxes
    }
    SendToProgram(buf, cps);
    if(cps->reload) ResendOptions(cps);
  } else {
    SendToProgram("xboard\n", cps);
  }
}

void TwoMachinesEventIfReady P((void))
{
  static int curMess = 0;
  if (first.lastPing != first.lastPong) {
    if(curMess != 1) DisplayMessage("", _("Waiting for first chess program")); curMess = 1;
    ScheduleDelayedEvent(TwoMachinesEventIfReady, 10); // [HGM] fast: lowered from 1000
    return;
  }
  if (second.lastPing != second.lastPong) {
    if(curMess != 2) DisplayMessage("", _("Waiting for second chess program")); curMess = 2;
    ScheduleDelayedEvent(TwoMachinesEventIfReady, 10); // [HGM] fast: lowered from 1000
    return;
  }
  DisplayMessage("", ""); curMess = 0;
  TwoMachinesEvent();
}

char * MakeName (char *template)
{
  time_t clock;
  struct tm *tm;
  static char buf[MSG_SIZ];
  char *p = buf;
  int i;

  clock = time((time_t *)NULL);
  tm = localtime(&clock);

  while(*p++ = *template++) if(p[-1] == '%') {
    switch(*template++) {
      case 0:   *p = 0; return buf;
      case 'Y': i = tm->tm_year+1900; break;
      case 'y': i = tm->tm_year-100; break;
      case 'M': i = tm->tm_mon+1; break;
      case 'd': i = tm->tm_mday; break;
      case 'h': i = tm->tm_hour; break;
      case 'm': i = tm->tm_min; break;
      case 's': i = tm->tm_sec; break;
      default:  i = 0;
    }
    snprintf(p-1, MSG_SIZ-10 - (p - buf), "%02d", i); p += strlen(p);
  }
  return buf;
}

int CountPlayers (char *p)
{
  int n = 0;
  while(p = strchr(p, '\n')) p++, n++; // count participants
  return n;
}

FILE * WriteTourneyFile (char *results, FILE *f)
{   // write tournament parameters on tourneyFile; on success return the stream pointer for closing
  if(f == NULL) f = fopen(appData.tourneyFile, "w");
  if(f == NULL) DisplayError(_("Could not write on tourney file"), 0); else {
    // create a file with tournament description
    fprintf(f, "-participants {%s}\n", appData.participants);
    fprintf(f, "-seedBase %d\n", appData.seedBase);
    fprintf(f, "-tourneyType %d\n", appData.tourneyType);
    fprintf(f, "-tourneyCycles %d\n", appData.tourneyCycles);
    fprintf(f, "-defaultMatchGames %d\n", appData.defaultMatchGames);
    fprintf(f, "-syncAfterRound %s\n", appData.roundSync ? "true" : "false");
    fprintf(f, "-syncAfterCycle %s\n", appData.cycleSync ? "true" : "false");
    fprintf(f, "-saveGameFile \"%s\"\n", appData.saveGameFile);
    fprintf(f, "-loadGameFile \"%s\"\n", appData.loadGameFile);
    fprintf(f, "-loadGameIndex %d\n", appData.loadGameIndex);
    fprintf(f, "-loadPositionFile \"%s\"\n", appData.loadPositionFile);
    fprintf(f, "-loadPositionIndex %d\n", appData.loadPositionIndex);
    fprintf(f, "-rewindIndex %d\n", appData.rewindIndex);
    fprintf(f, "-usePolyglotBook %s\n", appData.usePolyglotBook ? "true" : "false");
    fprintf(f, "-polyglotBook \"%s\"\n", appData.polyglotBook);
    fprintf(f, "-bookDepth %d\n", appData.bookDepth);
    fprintf(f, "-bookVariation %d\n", appData.bookStrength);
    fprintf(f, "-discourageOwnBooks %s\n", appData.defNoBook ? "true" : "false");
    fprintf(f, "-defaultHashSize %d\n", appData.defaultHashSize);
    fprintf(f, "-defaultCacheSizeEGTB %d\n", appData.defaultCacheSizeEGTB);
    fprintf(f, "-ponderNextMove %s\n", appData.ponderNextMove ? "true" : "false");
    fprintf(f, "-smpCores %d\n", appData.smpCores);
    if(searchTime > 0)
      fprintf(f, "-searchTime \"%d:%02d\"\n", searchTime/60, searchTime%60);
    else {
      fprintf(f, "-mps %d\n", appData.movesPerSession);
      fprintf(f, "-tc %s\n", appData.timeControl);
      fprintf(f, "-inc %.2f\n", appData.timeIncrement);
    }
    fprintf(f, "-results \"%s\"\n", results);
  }
  return f;
}

char *command[MAXENGINES], *mnemonic[MAXENGINES];

void Substitute (char *participants, int expunge)
{
  int i, changed, changes=0, nPlayers=0;
  char *p, *q, *r, buf[MSG_SIZ];
  if(participants == NULL) return;
  if(appData.tourneyFile[0] == NULLCHAR) { free(participants); return; }
  r = p = participants; q = appData.participants;
  while(*p && *p == *q) {
    if(*p == '\n') r = p+1, nPlayers++;
    p++; q++;
  }
  if(*p) { // difference
    while(*p && *p++ != '\n')
      ;
    while(*q && *q++ != '\n')
      ;
    changed = nPlayers;
    changes = 1 + (strcmp(p, q) != 0);
  }
  if(changes == 1) { // a single engine mnemonic was changed
    q = r; while(*q) nPlayers += (*q++ == '\n');
    p = buf; while(*r && (*p = *r++) != '\n') p++;
    *p = NULLCHAR;
    NamesToList(firstChessProgramNames, command, mnemonic, "all");
    for(i=1; mnemonic[i]; i++) if(!strcmp(buf, mnemonic[i])) break;
    if(mnemonic[i]) { // The substitute is valid
      FILE *f;
      if(appData.tourneyFile[0] && (f = fopen(appData.tourneyFile, "r+")) ) {
        flock(fileno(f), LOCK_EX);
        ParseArgsFromFile(f);
        fseek(f, 0, SEEK_SET);
        FREE(appData.participants); appData.participants = participants;
        if(expunge) { // erase results of replaced engine
          int len = strlen(appData.results), w, b, dummy;
          for(i=0; i<len; i++) {
            Pairing(i, nPlayers, &w, &b, &dummy);
            if((w == changed || b == changed) && appData.results[i] == '*') {
              DisplayError(_("You cannot replace an engine while it is engaged!\nTerminate its game first."), 0);
              fclose(f);
              return;
            }
          }
          for(i=0; i<len; i++) {
            Pairing(i, nPlayers, &w, &b, &dummy);
            if(w == changed || b == changed) appData.results[i] = ' '; // mark as not played
          }
        }
        WriteTourneyFile(appData.results, f);
        fclose(f); // release lock
        return;
      }
    } else DisplayError(_("No engine with the name you gave is installed"), 0);
  }
  if(changes == 0) DisplayError(_("First change an engine by editing the participants list\nof the Tournament Options dialog"), 0);
  if(changes > 1)  DisplayError(_("You can only change one engine at the time"), 0);
  free(participants);
  return;
}

int CheckPlayers (char *participants)
{
  int i;
  char buf[MSG_SIZ], *p;
  NamesToList(firstChessProgramNames, command, mnemonic, "all");
  while(p = strchr(participants, '\n')) {
    *p = NULLCHAR;
    for(i=1; mnemonic[i]; i++) if(!strcmp(participants, mnemonic[i])) break;
    if(!mnemonic[i]) {
      snprintf(buf, MSG_SIZ, _("No engine %s is installed"), participants);
      *p = '\n';
      DisplayError(buf, 0);
      return 1;
    }
    *p = '\n';
    participants = p + 1;
  }
  return 0;
}

int CreateTourney (char *name)
{
  FILE *f;
  if(matchMode && strcmp(name, appData.tourneyFile)) {
    ASSIGN(name, appData.tourneyFile); //do not allow change of tourneyfile while playing
  }
  if(name[0] == NULLCHAR) {
    if(appData.participants[0])
      DisplayError(_("You must supply a tournament file,\nfor storing the tourney progress"), 0);
    return 0;
  }
  f = fopen(name, "r");
  if(f) { // file exists
    ASSIGN(appData.tourneyFile, name);
    ParseArgsFromFile(f); // parse it
  } else {
    if(!appData.participants[0]) return 0; // ignore tourney file if non-existing & no participants
    if(CountPlayers(appData.participants) < (appData.tourneyType>0 ? appData.tourneyType+1 : 2)) {
      DisplayError(_("Not enough participants"), 0);
      return 0;
    }
    if(CheckPlayers(appData.participants)) return 0;
    ASSIGN(appData.tourneyFile, name);
    if(appData.tourneyType < 0) appData.defaultMatchGames = 1; // Swiss forces games/pairing = 1
    if((f = WriteTourneyFile("", NULL)) == NULL) return 0;
  }
  fclose(f);
  appData.noChessProgram = FALSE;
  appData.clockMode = TRUE;
  SetGNUMode();
  return 1;
}

int NamesToList (char *names, char **engineList, char **engineMnemonic, char *group)
{
  char buf[2*MSG_SIZ], *p, *q;
  int i=1, header, skip, all = !strcmp(group, "all"), depth = 0;
  insert = names; // afterwards, this global will point just after last retrieved engine line or group end in the 'names'
  skip = !all && group[0]; // if group requested, we start in skip mode
  for(;*names && depth >= 0 && i < MAXENGINES-1; names = p) {
    p = names; q = buf; header = 0;
    while(*p && *p != '\n') *q++ = *p++;
    *q = 0;
    if(*p == '\n') p++;
    if(buf[0] == '#') {
      if(strstr(buf, "# end") == buf) { if(!--depth) insert = p; continue; } // leave group, and suppress printing label
      depth++; // we must be entering a new group
      if(all) continue; // suppress printing group headers when complete list requested
      header = 1;
      if(skip && !strcmp(group, buf)) { depth = 0; skip = FALSE; } // start when we reach requested group
    }
    if(depth != header && !all || skip) continue; // skip contents of group (but print first-level header)
    if(engineList[i]) free(engineList[i]);
    engineList[i] = strdup(buf);
    if(buf[0] != '#') insert = p, TidyProgramName(engineList[i], "localhost", buf); // group headers not tidied
    if(engineMnemonic[i]) free(engineMnemonic[i]);
    if((q = strstr(engineList[i]+2, "variant")) && q[-2]== ' ' && (q[-1]=='/' || q[-1]=='-') && (q[7]==' ' || q[7]=='=')) {
      strcat(buf, " (");
      sscanf(q + 8, "%s", buf + strlen(buf));
      strcat(buf, ")");
    }
    engineMnemonic[i] = strdup(buf);
    i++;
  }
  engineList[i] = engineMnemonic[i] = NULL;
  return i;
}

// following implemented as macro to avoid type limitations
#define SWAP(item, temp) temp = appData.item[0]; appData.item[0] = appData.item[n]; appData.item[n] = temp;

void SwapEngines (int n)
{   // swap settings for first engine and other engine (so far only some selected options)
  int h;
  char *p;
  if(n == 0) return;
  SWAP(directory, p)
    SWAP(chessProgram, p)
    SWAP(isUCI, h)
    SWAP(hasOwnBookUCI, h)
    SWAP(protocolVersion, h)
    SWAP(reuse, h)
    SWAP(scoreIsAbsolute, h)
    SWAP(timeOdds, h)
    SWAP(logo, p)
    SWAP(pgnName, p)
    SWAP(pvSAN, h)
    SWAP(engOptions, p)
    SWAP(engInitString, p)
    SWAP(computerString, p)
    SWAP(features, p)
    SWAP(fenOverride, p)
    SWAP(NPS, h)
    SWAP(accumulateTC, h)
    SWAP(drawDepth, h)
    SWAP(host, p)
    SWAP(pseudo, h)
}

int GetEngineLine (char *s, int n)
{
  int i;
  char buf[MSG_SIZ];
  extern char *icsNames;
  if(!s || !*s) return 0;
  NamesToList(n >= 10 ? icsNames : firstChessProgramNames, command, mnemonic, "all");
  for(i=1; mnemonic[i]; i++) if(!strcmp(s, mnemonic[i])) break;
  if(!mnemonic[i]) return 0;
  if(n == 11) return 1; // just testing if there was a match
  snprintf(buf, MSG_SIZ, "-%s %s", n == 10 ? "icshost" : "fcp", command[i]);
  if(n == 1) SwapEngines(n);
  ParseArgsFromString(buf);
  if(n == 1) SwapEngines(n);
  if(n == 0 && *appData.secondChessProgram == NULLCHAR) {
    SwapEngines(1); // set second same as first if not yet set (to suppress WB startup dialog)
    ParseArgsFromString(buf);
  }
  return 1;
}

int SetPlayer (int player, char *p)
{   // [HGM] find the engine line of the partcipant given by number, and parse its options.
  int i;
  char buf[MSG_SIZ], *engineName;
  for(i=0; i<player; i++) p = strchr(p, '\n') + 1;
  engineName = strdup(p); if(p = strchr(engineName, '\n')) *p = NULLCHAR;
  for(i=1; command[i]; i++) if(!strcmp(mnemonic[i], engineName)) break;
  if(mnemonic[i]) {
    snprintf(buf, MSG_SIZ, "-fcp %s", command[i]);
    ParseArgsFromString(resetOptions); appData.fenOverride[0] = NULL; appData.pvSAN[0] = FALSE;
    appData.firstHasOwnBookUCI = !appData.defNoBook; appData.protocolVersion[0] = PROTOVER;
    ParseArgsFromString(buf);
  } else { // no engine with this nickname is installed!
    snprintf(buf, MSG_SIZ, _("No engine %s is installed"), engineName);
    ReserveGame(nextGame, ' '); // unreserve game and drop out of match mode with error
    matchMode = FALSE; appData.matchGames = matchGame = roundNr = 0;
    ModeHighlight();
    DisplayError(buf, 0);
    return 0;
  }
  free(engineName);
  return i;
}

char *recentEngines;

void RecentEngineEvent (int nr)
{
  int n;
  //    SwapEngines(1); // bump first to second
  //    ReplaceEngine(&second, 1); // and load it there
  NamesToList(firstChessProgramNames, command, mnemonic, "all"); // get mnemonics of installed engines
  n = SetPlayer(nr, recentEngines); // select new (using original menu order!)
  if(mnemonic[n]) { // if somehow the engine with the selected nickname is no longer found in the list, we skip
    ReplaceEngine(&first, 0);
    FloatToFront(&appData.recentEngineList, command[n]);
  }
}

int Pairing (int nr, int nPlayers, int *whitePlayer, int *blackPlayer, int *syncInterval)
{   // determine players from game number
  int curCycle, curRound, curPairing, gamesPerCycle, gamesPerRound, roundsPerCycle=1, pairingsPerRound=1;

  if(appData.tourneyType == 0) {
    roundsPerCycle = (nPlayers - 1) | 1;
    pairingsPerRound = nPlayers / 2;
  } else if(appData.tourneyType > 0) {
    roundsPerCycle = nPlayers - appData.tourneyType;
    pairingsPerRound = appData.tourneyType;
  }
  gamesPerRound = pairingsPerRound * appData.defaultMatchGames;
  gamesPerCycle = gamesPerRound * roundsPerCycle;
  appData.matchGames = gamesPerCycle * appData.tourneyCycles - 1; // fake like all games are one big match
  curCycle = nr / gamesPerCycle; nr %= gamesPerCycle;
  curRound = nr / gamesPerRound; nr %= gamesPerRound;
  curPairing = nr / appData.defaultMatchGames; nr %= appData.defaultMatchGames;
  matchGame = nr + curCycle * appData.defaultMatchGames + 1; // fake game nr that loads correct game or position from file
  roundNr = (curCycle * roundsPerCycle + curRound) * appData.defaultMatchGames + nr + 1;

  if(appData.cycleSync) *syncInterval = gamesPerCycle;
  if(appData.roundSync) *syncInterval = gamesPerRound;

  if(appData.debugMode) fprintf(debugFP, "cycle=%d, round=%d, pairing=%d curGame=%d\n", curCycle, curRound, curPairing, matchGame);

  if(appData.tourneyType == 0) {
    if(curPairing == (nPlayers-1)/2 ) {
      *whitePlayer = curRound;
      *blackPlayer = nPlayers - 1; // this is the 'bye' when nPlayer is odd
    } else {
      *whitePlayer = curRound - (nPlayers-1)/2 + curPairing;
      if(*whitePlayer < 0) *whitePlayer += nPlayers-1+(nPlayers&1);
      *blackPlayer = curRound + (nPlayers-1)/2 - curPairing;
      if(*blackPlayer >= nPlayers-1+(nPlayers&1)) *blackPlayer -= nPlayers-1+(nPlayers&1);
    }
  } else if(appData.tourneyType > 1) {
    *blackPlayer = curPairing; // in multi-gauntlet, assign gauntlet engines to second, so first an be kept loaded during round
    *whitePlayer = curRound + appData.tourneyType;
  } else if(appData.tourneyType > 0) {
    *whitePlayer = curPairing;
    *blackPlayer = curRound + appData.tourneyType;
  }

  // take care of white/black alternation per round.
  // For cycles and games this is already taken care of by default, derived from matchGame!
  return curRound & 1;
}

int NextTourneyGame (int nr, int *swapColors)
{   // !!!major kludge!!! fiddle appData settings to get everything in order for next tourney game
  char *p, *q;
  int whitePlayer, blackPlayer, firstBusy=1000000000, syncInterval = 0, nPlayers, OK = 1;
  FILE *tf;
  if(appData.tourneyFile[0] == NULLCHAR) return 1; // no tourney, always allow next game
  tf = fopen(appData.tourneyFile, "r");
  if(tf == NULL) { DisplayFatalError(_("Bad tournament file"), 0, 1); return 0; }
  ParseArgsFromFile(tf); fclose(tf);
  InitTimeControls(); // TC might be altered from tourney file

  nPlayers = CountPlayers(appData.participants); // count participants
  if(appData.tourneyType < 0) syncInterval = nPlayers/2; else
    *swapColors = Pairing(nr<0 ? 0 : nr, nPlayers, &whitePlayer, &blackPlayer, &syncInterval);

  if(syncInterval) {
    p = q = appData.results;
    while(*q) if(*q++ == '*' || q[-1] == ' ') { firstBusy = q - p - 1; break; }
    if(firstBusy/syncInterval < (nextGame/syncInterval)) {
      DisplayMessage(_("Waiting for other game(s)"),"");
      waitingForGame = TRUE;
      ScheduleDelayedEvent(NextMatchGame, 1000); // wait for all games of previous round to finish
      return 0;
    }
    waitingForGame = FALSE;
  }

  if(appData.tourneyType < 0) {
    if(nr>=0 && !pairingReceived) {
      char buf[1<<16];
      if(pairing.pr == NoProc) {
        if(!appData.pairingEngine[0]) {
          DisplayFatalError(_("No pairing engine specified"), 0, 1);
          return 0;
        }
        StartChessProgram(&pairing); // starts the pairing engine
      }
      snprintf(buf, 1<<16, "results %d %s\n", nPlayers, appData.results);
      SendToProgram(buf, &pairing);
      snprintf(buf, 1<<16, "pairing %d\n", nr+1);
      SendToProgram(buf, &pairing);
      return 0; // wait for pairing engine to answer (which causes NextTourneyGame to be called again...
    }
    pairingReceived = 0;                              // ... so we continue here
    *swapColors = 0;
    appData.matchGames = appData.tourneyCycles * syncInterval - 1;
    whitePlayer = savedWhitePlayer-1; blackPlayer = savedBlackPlayer-1;
    matchGame = 1; roundNr = nr / syncInterval + 1;
  }

  if(first.pr != NoProc && second.pr != NoProc || nr<0) return 1; // engines already loaded

  // redefine engines, engine dir, etc.
  NamesToList(firstChessProgramNames, command, mnemonic, "all"); // get mnemonics of installed engines
  if(first.pr == NoProc) {
    if(!SetPlayer(whitePlayer, appData.participants)) OK = 0; // find white player amongst it, and parse its engine line
    InitEngine(&first, 0);  // initialize ChessProgramStates based on new settings.
  }
  if(second.pr == NoProc) {
    SwapEngines(1);
    if(!SetPlayer(blackPlayer, appData.participants)) OK = 0; // find black player amongst it, and parse its engine line
    SwapEngines(1);         // and make that valid for second engine by swapping
    InitEngine(&second, 1);
  }
  CommonEngineInit();     // after this TwoMachinesEvent will create correct engine processes
  UpdateLogos(FALSE);     // leave display to ModeHiglight()
  return OK;
}

void NextMatchGame ()
{   // performs game initialization that does not invoke engines, and then tries to start the game
  int res, firstWhite, swapColors = 0;
  if(!NextTourneyGame(nextGame, &swapColors)) return; // this sets matchGame, -fcp / -scp and other options for next game, if needed
  if(matchMode && appData.debugMode) { // [HGM] debug split: game is part of a match; we might have to create a debug file just for this game
    char buf[MSG_SIZ];
    snprintf(buf, MSG_SIZ, appData.nameOfDebugFile, nextGame+1); // expand name of debug file with %d in it
    if(strcmp(buf, currentDebugFile)) { // name has changed
      FILE *f = fopen(buf, "w");
      if(f) { // if opening the new file failed, just keep using the old one
        ASSIGN(currentDebugFile, buf);
        fclose(debugFP);
        debugFP = f;
      }
      if(appData.serverFileName) {
        if(serverFP) fclose(serverFP);
        serverFP = fopen(appData.serverFileName, "w");
        if(serverFP && first.pr != NoProc) fprintf(serverFP, "StartChildProcess (dir=\".\") .\\%s\n", first.tidy);
        if(serverFP && second.pr != NoProc) fprintf(serverFP, "StartChildProcess (dir=\".\") .\\%s\n", second.tidy);
      }
    }
  }
  firstWhite = appData.firstPlaysBlack ^ (matchGame & 1 | appData.sameColorGames > 1); // non-incremental default
  firstWhite ^= swapColors; // reverses if NextTourneyGame says we are in an odd round
  first.twoMachinesColor =  firstWhite ? "white\n" : "black\n";   // perform actual color assignement
  second.twoMachinesColor = firstWhite ? "black\n" : "white\n";
  appData.noChessProgram = (first.pr == NoProc); // kludge to prevent Reset from starting up chess program
  if(appData.loadGameIndex == -2) srandom(appData.seedBase + 68163*(nextGame & ~1)); // deterministic seed to force same opening
  Reset(FALSE, first.pr != NoProc);
  res = LoadGameOrPosition(matchGame); // setup game
  appData.noChessProgram = FALSE; // LoadGameOrPosition might call Reset too!
  if(!res) return; // abort when bad game/pos file
  if(appData.epd) {// in EPD mode we make sure first engine is to move
    firstWhite = !(forwardMostMove & 1);
    first.twoMachinesColor =  firstWhite ? "white\n" : "black\n";   // perform actual color assignement
    second.twoMachinesColor = firstWhite ? "black\n" : "white\n";
  }
  TwoMachinesEvent();
}

void UserAdjudicationEvent (int result)
{
  ChessMove gameResult = GameIsDrawn;

  if( result > 0 ) {
    gameResult = WhiteWins;
  }
  else if( result < 0 ) {
    gameResult = BlackWins;
  }

  if( gameMode == TwoMachinesPlay ) {
    GameEnds( gameResult, "User adjudication", GE_XBOARD );
  }
}


// [HGM] save: calculate checksum of game to make games easily identifiable
int StringCheckSum (char *s)
{
  int i = 0;
  if(s==NULL) return 0;
  while(*s) i = i*259 + *s++;
  return i;
}

int GameCheckSum ()
{
  int i, sum=0;
  for(i=backwardMostMove; i<forwardMostMove; i++) {
    sum += pvInfoList[i].depth;
    sum += StringCheckSum(parseList[i]);
    sum += StringCheckSum(commentList[i]);
    sum *= 261;
  }
  if(i>1 && sum==0) sum++; // make sure never zero for non-empty game
  return sum + StringCheckSum(commentList[i]);
} // end of save patch

void GameEnds (ChessMove result, char *resultDetails, int whosays)
{
  GameMode nextGameMode;
  int isIcsGame;
  char buf[MSG_SIZ], popupRequested = 0, *ranking = NULL;

  if(endingGame) return; /* [HGM] crash: forbid recursion */
  endingGame = 1;
  if(twoBoards) { // [HGM] dual: switch back to one board
    twoBoards = partnerUp = 0; InitDrawingSizes(-2, 0);
    DrawPosition(TRUE, partnerBoard); // observed game becomes foreground
  }
  if (appData.debugMode) {
    fprintf(debugFP, "GameEnds(%d, %s, %d)\n",
        result, resultDetails ? resultDetails : "(null)", whosays);
  }

  fromX = fromY = killX = killY = kill2X = kill2Y = -1; // [HGM] abort any move the user is entering. // [HGM] lion

  if(pausing) PauseEvent(); // can happen when we abort a paused game (New Game or Quit)

  if (appData.icsActive && (whosays == GE_ENGINE || whosays >= GE_ENGINE1)) {
    /* If we are playing on ICS, the server decides when the
       game is over, but the engine can offer to draw, claim
       a draw, or resign.
       */
#if ZIPPY
    if (appData.zippyPlay && first.initDone) {
      if (result == GameIsDrawn) {
        /* In case draw still needs to be claimed */
        SendToICS(ics_prefix);
        SendToICS("draw\n");
      } else if (StrCaseStr(resultDetails, "resign")) {
        SendToICS(ics_prefix);
        SendToICS("resign\n");
      }
    }
#endif
    endingGame = 0; /* [HGM] crash */
    return;
  }

  /* If we're loading the game from a file, stop */
  if (whosays == GE_FILE) {
    (void) StopLoadGameTimer();
    gameFileFP = NULL;
  }

  /* Cancel draw offers */
  first.offeredDraw = second.offeredDraw = 0;

  /* If this is an ICS game, only ICS can really say it's done;
     if not, anyone can. */
  isIcsGame = (gameMode == IcsPlayingWhite ||
      gameMode == IcsPlayingBlack ||
      gameMode == IcsObserving    ||
      gameMode == IcsExamining);

  if (!isIcsGame || whosays == GE_ICS) {
    /* OK -- not an ICS game, or ICS said it was done */
    StopClocks();
    if (!isIcsGame && !appData.noChessProgram)
      SetUserThinkingEnables();

    /* [HGM] if a machine claims the game end we verify this claim */
    if(gameMode == TwoMachinesPlay && appData.testClaims) {
      if(appData.testLegality && whosays >= GE_ENGINE1 ) {
        char claimer;
        ChessMove trueResult = (ChessMove) -1;

        claimer = whosays == GE_ENGINE1 ?      /* color of claimer */
          first.twoMachinesColor[0] :
          second.twoMachinesColor[0] ;

        // [HGM] losers: because the logic is becoming a bit hairy, determine true result first
        if((signed char)boards[forwardMostMove][EP_STATUS] == EP_CHECKMATE) {
          /* [HGM] verify: engine mate claims accepted if they were flagged */
          trueResult = WhiteOnMove(forwardMostMove) ? BlackWins : WhiteWins;
        } else
          if((signed char)boards[forwardMostMove][EP_STATUS] == EP_WINS) { // added code for games where being mated is a win
            /* [HGM] verify: engine mate claims accepted if they were flagged */
            trueResult = WhiteOnMove(forwardMostMove) ? WhiteWins : BlackWins;
          } else
            if((signed char)boards[forwardMostMove][EP_STATUS] == EP_STALEMATE) { // only used to indicate draws now
              trueResult = GameIsDrawn; // default; in variants where stalemate loses, Status is CHECKMATE
            }

        // now verify win claims, but not in drop games, as we don't understand those yet
        if( (gameInfo.holdingsWidth == 0 || gameInfo.variant == VariantSuper
              || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand) &&
            (result == WhiteWins && claimer == 'w' ||
             result == BlackWins && claimer == 'b'   ) ) { // case to verify: engine claims own win
          if (appData.debugMode) {
            fprintf(debugFP, "result=%d sp=%d move=%d\n",
                result, (signed char)boards[forwardMostMove][EP_STATUS], forwardMostMove);
          }
          if(result != trueResult) {
            snprintf(buf, MSG_SIZ, "False win claim: '%s'", resultDetails);
            result = claimer == 'w' ? BlackWins : WhiteWins;
            resultDetails = buf;
          }
        } else
          if( result == GameIsDrawn && (signed char)boards[forwardMostMove][EP_STATUS] > EP_DRAWS
              && (forwardMostMove <= backwardMostMove ||
                (signed char)boards[forwardMostMove-1][EP_STATUS] > EP_DRAWS ||
                (claimer=='b')==(forwardMostMove&1))
            ) {
            /* [HGM] verify: draws that were not flagged are false claims */
            snprintf(buf, MSG_SIZ, "False draw claim: '%s'", resultDetails);
            result = claimer == 'w' ? BlackWins : WhiteWins;
            resultDetails = buf;
          }
        /* (Claiming a loss is accepted no questions asked!) */
      } else if(matchMode && result == GameIsDrawn && !strcmp(resultDetails, "Engine Abort Request")) {
        forwardMostMove = backwardMostMove; // [HGM] delete game to surpress saving
        result = GameUnfinished;
        if(!*appData.tourneyFile) matchGame--; // replay even in plain match
      }
      /* [HGM] bare: don't allow bare King to win */
      if((gameInfo.holdingsWidth == 0 || gameInfo.variant == VariantSuper
            || gameInfo.variant == VariantGreat || gameInfo.variant == VariantGrand)
          && gameInfo.variant != VariantLosers && gameInfo.variant != VariantGiveaway
          && gameInfo.variant != VariantSuicide // [HGM] losers: except in losers, of course...
          && result != GameIsDrawn)
      {   int i, j, k=0, oppoKings = 0, color = (result==WhiteWins ? (int)WhitePawn : (int)BlackPawn);
        for(j=BOARD_LEFT; j<BOARD_RGHT; j++) for(i=0; i<BOARD_HEIGHT; i++) {
          int p = (int)boards[forwardMostMove][i][j] - color;
          if(p >= 0 && p <= (int)WhiteKing) k++;
          oppoKings += (p + color == WhiteKing + BlackPawn - color);
        }
        if (appData.debugMode) {
          fprintf(debugFP, "GE(%d, %s, %d) bare king k=%d color=%d\n",
              result, resultDetails ? resultDetails : "(null)", whosays, k, color);
        }
        if(k <= 1 && oppoKings > 0) { // the latter needed in Atomic, where bare K wins if opponent King already destroyed
          result = GameIsDrawn;
          snprintf(buf, MSG_SIZ, "%s but bare king", resultDetails);
          resultDetails = buf;
        }
      }
    }


    if(serverMoves != NULL && !loadFlag) { char c = '=';
      if(result==WhiteWins) c = '+';
      if(result==BlackWins) c = '-';
      if(resultDetails != NULL)
        fprintf(serverMoves, ";%c;%s\n", c, resultDetails), fflush(serverMoves);
    }
    if (resultDetails != NULL) {
      gameInfo.result = result;
      gameInfo.resultDetails = StrSave(resultDetails);

      /* display last move only if game was not loaded from file */
      if ((whosays != GE_FILE) && (currentMove == forwardMostMove))
        DisplayMove(currentMove - 1);

      if (forwardMostMove != 0) {
        if (gameMode != PlayFromGameFile && gameMode != EditGame
            && lastSavedGame != GameCheckSum() // [HGM] save: suppress duplicates
           ) {
          if (*appData.saveGameFile != NULLCHAR) {
            if(result == GameUnfinished && matchMode && *appData.tourneyFile)
              AutoSaveGame(); // [HGM] protect tourney PGN from aborted games, and prompt for name instead
            else
              SaveGameToFile(appData.saveGameFile, TRUE);
          } else if (appData.autoSaveGames) {
            if(gameMode != IcsObserving || !appData.onlyOwn) AutoSaveGame();
          }
          if (*appData.savePositionFile != NULLCHAR) {
            SavePositionToFile(appData.savePositionFile);
          }
          AddGameToBook(FALSE); // Only does something during Monte-Carlo book building
        }
      }

      /* Tell program how game ended in case it is learning */
      /* [HGM] Moved this to after saving the PGN, just in case */
      /* engine died and we got here through time loss. In that */
      /* case we will get a fatal error writing the pipe, which */
      /* would otherwise lose us the PGN.                       */
      /* [HGM] crash: not needed anymore, but doesn't hurt;     */
      /* output during GameEnds should never be fatal anymore   */
      if (gameMode == MachinePlaysWhite ||
          gameMode == MachinePlaysBlack ||
          gameMode == TwoMachinesPlay ||
          gameMode == IcsPlayingWhite ||
          gameMode == IcsPlayingBlack ||
          gameMode == BeginningOfGame) {
        char buf[MSG_SIZ];
        snprintf(buf, MSG_SIZ, "result %s {%s}\n", PGNResult(result),
            resultDetails);
        if (first.pr != NoProc) {
          SendToProgram(buf, &first);
        }
        if (second.pr != NoProc &&
            gameMode == TwoMachinesPlay) {
          SendToProgram(buf, &second);
        }
      }
    }

    if (appData.icsActive) {
      if (appData.quietPlay &&
          (gameMode == IcsPlayingWhite ||
           gameMode == IcsPlayingBlack)) {
        SendToICS(ics_prefix);
        SendToICS("set shout 1\n");
      }
      nextGameMode = IcsIdle;
      ics_user_moved = FALSE;
      /* clean up premove.  It's ugly when the game has ended and the
       * premove highlights are still on the board.
       */
      if (gotPremove) {
        gotPremove = FALSE;
        ClearPremoveHighlights();
        DrawPosition(FALSE, boards[currentMove]);
      }
      if (whosays == GE_ICS) {
        switch (result) {
          case WhiteWins:
            if (gameMode == IcsPlayingWhite)
              PlayIcsWinSound();
            else if(gameMode == IcsPlayingBlack)
              PlayIcsLossSound();
            break;
          case BlackWins:
            if (gameMode == IcsPlayingBlack)
              PlayIcsWinSound();
            else if(gameMode == IcsPlayingWhite)
              PlayIcsLossSound();
            break;
          case GameIsDrawn:
            PlayIcsDrawSound();
            break;
          default:
            PlayIcsUnfinishedSound();
        }
      }
      if(appData.quitNext) { ExitEvent(0); return; }
    } else if (gameMode == EditGame ||
        gameMode == PlayFromGameFile ||
        gameMode == AnalyzeMode ||
        gameMode == AnalyzeFile) {
      nextGameMode = gameMode;
    } else {
      nextGameMode = EndOfGame;
    }
    pausing = FALSE;
    ModeHighlight();
  } else {
    nextGameMode = gameMode;
  }

  if (appData.noChessProgram) {
    gameMode = nextGameMode;
    ModeHighlight();
    endingGame = 0; /* [HGM] crash */
    return;
  }

  if (first.reuse) {
    /* Put first chess program into idle state */
    if (first.pr != NoProc &&
        (gameMode == MachinePlaysWhite ||
         gameMode == MachinePlaysBlack ||
         gameMode == TwoMachinesPlay ||
         gameMode == IcsPlayingWhite ||
         gameMode == IcsPlayingBlack ||
         gameMode == BeginningOfGame)) {
      SendToProgram("force\n", &first);
      if (first.usePing) {
        char buf[MSG_SIZ];
        snprintf(buf, MSG_SIZ, "ping %d\n", ++first.lastPing);
        SendToProgram(buf, &first);
      }
    }
  } else if (result != GameUnfinished || nextGameMode == IcsIdle) {
    /* Kill off first chess program */
    if (first.isr != NULL)
      RemoveInputSource(first.isr);
    first.isr = NULL;

    if (first.pr != NoProc) {
      ExitAnalyzeMode();
      DoSleep( appData.delayBeforeQuit );
      SendToProgram("quit\n", &first);
      DestroyChildProcess(first.pr, 4 + first.useSigterm);
      first.reload = TRUE;
    }
    first.pr = NoProc;
  }
  if (second.reuse) {
    /* Put second chess program into idle state */
    if (second.pr != NoProc &&
        gameMode == TwoMachinesPlay) {
      SendToProgram("force\n", &second);
      if (second.usePing) {
        char buf[MSG_SIZ];
        snprintf(buf, MSG_SIZ, "ping %d\n", ++second.lastPing);
        SendToProgram(buf, &second);
      }
    }
  } else if (result != GameUnfinished || nextGameMode == IcsIdle) {
    /* Kill off second chess program */
    if (second.isr != NULL)
      RemoveInputSource(second.isr);
    second.isr = NULL;

    if (second.pr != NoProc) {
      DoSleep( appData.delayBeforeQuit );
      SendToProgram("quit\n", &second);
      DestroyChildProcess(second.pr, 4 + second.useSigterm);
      second.reload = TRUE;
    }
    second.pr = NoProc;
  }

  if (matchMode && (gameMode == TwoMachinesPlay || (waitingForGame || startingEngine) && exiting)) {
    char resChar = '=';
    switch (result) {
      case WhiteWins:
        resChar = '+';
        if (first.twoMachinesColor[0] == 'w') {
          first.matchWins++;
        } else {
          second.matchWins++;
        }
        break;
      case BlackWins:
        resChar = '-';
        if (first.twoMachinesColor[0] == 'b') {
          first.matchWins++;
        } else {
          second.matchWins++;
        }
        break;
      case GameUnfinished:
        resChar = ' ';
      default:
        break;
    }

    if(exiting) resChar = ' '; // quit while waiting for round sync: unreserve already reserved game
    if(appData.tourneyFile[0]){ // [HGM] we are in a tourney; update tourney file with game result
      if(appData.afterGame && appData.afterGame[0]) RunCommand(appData.afterGame);
      ReserveGame(nextGame, resChar); // sets nextGame
      if(nextGame > appData.matchGames) appData.tourneyFile[0] = 0, ranking = TourneyStandings(3); // tourney is done
      else ranking = strdup("busy"); //suppress popup when aborted but not finished
    } else roundNr = nextGame = matchGame + 1; // normal match, just increment; round equals matchGame

    if (nextGame <= appData.matchGames && !abortMatch) {
      gameMode = nextGameMode;
      matchGame = nextGame; // this will be overruled in tourney mode!
      GetTimeMark(&pauseStart); // [HGM] matchpause: stipulate a pause
      ScheduleDelayedEvent(NextMatchGame, 10); // but start game immediately (as it will wait out the pause itself)
      endingGame = 0; /* [HGM] crash */
      return;
    } else {
      gameMode = nextGameMode;
      if(appData.epd) {
        snprintf(buf, MSG_SIZ, "-------------------------------------- ");
        OutputKibitz(2, buf);
        snprintf(buf, MSG_SIZ, _("Average solving time %4.2f sec (total time %4.2f sec) "), totalTime/(100.*first.matchWins), totalTime/100.);
        OutputKibitz(2, buf);
        snprintf(buf, MSG_SIZ, _("%d avoid-moves played "), second.matchWins);
        if(second.matchWins) OutputKibitz(2, buf);
        snprintf(buf, MSG_SIZ, _("Solved %d out of %d (%3.1f%%) "), first.matchWins, nextGame-1, first.matchWins*100./(nextGame-1));
        OutputKibitz(2, buf);
      }
      snprintf(buf, MSG_SIZ, _("Match %s vs. %s: final score %d-%d-%d"),
          first.tidy, second.tidy,
          first.matchWins, second.matchWins,
          appData.matchGames - (first.matchWins + second.matchWins));
      if(!appData.tourneyFile[0]) matchGame++, DisplayTwoMachinesTitle(); // [HGM] update result in window title
      if(ranking && strcmp(ranking, "busy") && appData.afterTourney && appData.afterTourney[0]) RunCommand(appData.afterTourney);
      popupRequested++; // [HGM] crash: postpone to after resetting endingGame
      if (appData.firstPlaysBlack) { // [HGM] match: back to original for next match
        first.twoMachinesColor = "black\n";
        second.twoMachinesColor = "white\n";
      } else {
        first.twoMachinesColor = "white\n";
        second.twoMachinesColor = "black\n";
      }
    }
  }
  if ((gameMode == AnalyzeMode || gameMode == AnalyzeFile) &&
      !(nextGameMode == AnalyzeMode || nextGameMode == AnalyzeFile))
    ExitAnalyzeMode();
  gameMode = nextGameMode;
  ModeHighlight();
  endingGame = 0;  /* [HGM] crash */
  if(popupRequested) { // [HGM] crash: this calls GameEnds recursively through ExitEvent! Make it a harmless tail recursion.
    if(matchMode == TRUE) { // match through command line: exit with or without popup
      if(ranking) {
        ToNrEvent(forwardMostMove);
        if(strcmp(ranking, "busy")) DisplayFatalError(ranking, 0, 0);
        else ExitEvent(0);
      } else DisplayFatalError(buf, 0, 0);
    } else { // match through menu; just stop, with or without popup
      matchMode = FALSE; appData.matchGames = matchGame = roundNr = 0;
      ModeHighlight();
      if(ranking){
        if(strcmp(ranking, "busy")) DisplayNote(ranking);
      } else DisplayNote(buf);
    }
    if(ranking) free(ranking);
  }
}

/* Assumes program was just initialized (initString sent).
   Leaves program in force mode. */
void FeedMovesToProgram (ChessProgramState *cps, int upto)
{
  int i;

  if (appData.debugMode)
    fprintf(debugFP, "Feeding %smoves %d through %d to %s chess program\n",
        startedFromSetupPosition ? "position and " : "",
        backwardMostMove, upto, cps->which);
  if(currentlyInitializedVariant != gameInfo.variant) {
    char buf[MSG_SIZ];
    // [HGM] variantswitch: make engine aware of new variant
    if(!SupportedVariant(cps->variants, gameInfo.variant, gameInfo.boardWidth,
          gameInfo.boardHeight, gameInfo.holdingsSize, cps->protocolVersion, ""))
      return; // [HGM] refrain from feeding moves altogether if variant is unsupported!
    snprintf(buf, MSG_SIZ, "variant %s\n", VariantName(gameInfo.variant));
    SendToProgram(buf, cps);
    currentlyInitializedVariant = gameInfo.variant;
  }
  SendToProgram("force\n", cps);
  if (startedFromSetupPosition) {
    SendBoard(cps, backwardMostMove);
    if (appData.debugMode) {
      fprintf(debugFP, "feedMoves\n");
    }
  }
  for (i = backwardMostMove; i < upto; i++) {
    SendMoveToProgram(i, cps);
  }
}


int ResurrectChessProgram ()
{
  /* The chess program may have exited.
     If so, restart it and feed it all the moves made so far. */
  static int doInit = 0;

  if (appData.noChessProgram) return 1;

  if(matchMode /*&& appData.tourneyFile[0]*/) { // [HGM] tourney: make sure we get features after engine replacement. (Should we always do this?)
    if(WaitForEngine(&first, TwoMachinesEventIfReady)) { doInit = 1; return 0; } // request to do init on next visit, because we started engine
    if(!doInit) return 1; // this replaces testing first.pr != NoProc, which is true when we get here, but first time no reason to abort
    doInit = 0; // we fell through (first time after starting the engine); make sure it doesn't happen again
  } else {
    if (first.pr != NoProc) return 1;
    StartChessProgram(&first);
  }
  InitChessProgram(&first, FALSE);
  FeedMovesToProgram(&first, currentMove);

  if (!first.sendTime) {
    /* can't tell gnuchess what its clock should read,
       so we bow to its notion. */
    ResetClocks();
    timeRemaining[0][currentMove] = whiteTimeRemaining;
    timeRemaining[1][currentMove] = blackTimeRemaining;
  }

  if ((gameMode == AnalyzeMode || gameMode == AnalyzeFile ||
        appData.icsEngineAnalyze) && first.analysisSupport) {
    SendToProgram("analyze\n", &first);
    first.analyzing = TRUE;
  }
  return 1;
}

/*
 * Button procedures
 */
void Reset (int redraw, int init)
{
  int i;

  if (appData.debugMode) {
    fprintf(debugFP, "Reset(%d, %d) from gameMode %d\n",
        redraw, init, gameMode);
  }
  pieceDefs = FALSE; // [HGM] gen: reset engine-defined piece moves
  deadRanks = 0; // assume entire board is used
  for(i=0; i<EmptySquare; i++) { FREE(pieceDesc[i]); pieceDesc[i] = NULL; }
  CleanupTail(); // [HGM] vari: delete any stored variations
  CommentPopDown(); // [HGM] make sure no comments to the previous game keep hanging on
  pausing = pauseExamInvalid = FALSE;
  startedFromSetupPosition = blackPlaysFirst = FALSE;
  firstMove = TRUE;
  whiteFlag = blackFlag = FALSE;
  userOfferedDraw = FALSE;
  hintRequested = bookRequested = FALSE;
  first.maybeThinking = FALSE;
  second.maybeThinking = FALSE;
  first.bookSuspend = FALSE; // [HGM] book
  second.bookSuspend = FALSE;
  thinkOutput[0] = NULLCHAR;
  lastHint[0] = NULLCHAR;
  ClearGameInfo(&gameInfo);
  gameInfo.variant = StringToVariant(appData.variant);
  if(gameInfo.variant == VariantNormal && strcmp(appData.variant, "normal")) {
    gameInfo.variant = VariantUnknown;
    strncpy(engineVariant, appData.variant, MSG_SIZ);
  }
  ics_user_moved = ics_clock_paused = FALSE;
  ics_getting_history = H_FALSE;
  ics_gamenum = -1;
  white_holding[0] = black_holding[0] = NULLCHAR;
  ClearProgramStats();
  opponentKibitzes = FALSE; // [HGM] kibitz: do not reserve space in engine-output window in zippy mode

  ResetFrontEnd();
  ClearHighlights();
  flipView = appData.flipView;
  ClearPremoveHighlights();
  gotPremove = FALSE;
  alarmSounded = FALSE;
  killX = killY = kill2X = kill2Y = -1; // [HGM] lion

  GameEnds(EndOfFile, NULL, GE_PLAYER);
  if(appData.serverMovesName != NULL) {
    /* [HGM] prepare to make moves file for broadcasting */
    clock_t t = clock();
    if(serverMoves != NULL) fclose(serverMoves);
    serverMoves = fopen(appData.serverMovesName, "r");
    if(serverMoves != NULL) {
      fclose(serverMoves);
      /* delay 15 sec before overwriting, so all clients can see end */
      while(clock()-t < appData.serverPause*CLOCKS_PER_SEC);
    }
    serverMoves = fopen(appData.serverMovesName, "w");
  }

  ExitAnalyzeMode();
  gameMode = BeginningOfGame;
  ModeHighlight();
  if(appData.icsActive) gameInfo.variant = VariantNormal;
  currentMove = forwardMostMove = backwardMostMove = 0;
  MarkTargetSquares(1);
  InitPosition(redraw);
  for (i = 0; i < MAX_MOVES; i++) {
    if (commentList[i] != NULL) {
      free(commentList[i]);
      commentList[i] = NULL;
    }
  }
  ResetClocks();
  timeRemaining[0][0] = whiteTimeRemaining;
  timeRemaining[1][0] = blackTimeRemaining;

  if (first.pr == NoProc) {
    StartChessProgram(&first);
  }
  if (init) {
    InitChessProgram(&first, startedFromSetupPosition);
  }
  DisplayTitle("");
  DisplayMessage("", "");
  HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);
  lastSavedGame = 0; // [HGM] save: make sure next game counts as unsaved
  ClearMap();        // [HGM] exclude: invalidate map
}

void AutoPlayGameLoop ()
{
  for (;;) {
    if (!AutoPlayOneMove())
      return;
    if (matchMode || appData.timeDelay == 0)
      continue;
    if (appData.timeDelay < 0)
      return;
    StartLoadGameTimer((long)(1000.0f * appData.timeDelay));
    break;
  }
}

void AnalyzeNextGame()
{
  ReloadGame(1); // next game
}

int AutoPlayOneMove ()
{
  int fromX, fromY, toX, toY;

  if (appData.debugMode) {
    fprintf(debugFP, "AutoPlayOneMove(): current %d\n", currentMove);
  }

  if (gameMode != PlayFromGameFile && gameMode != AnalyzeFile)
    return FALSE;

  if (gameMode == AnalyzeFile && currentMove > backwardMostMove && programStats.depth) {
    pvInfoList[currentMove].depth = programStats.depth;
    pvInfoList[currentMove].score = programStats.score;
    pvInfoList[currentMove].time  = 0;
    //if(currentMove < forwardMostMove) {
    //  AppendComment(currentMove+1, lastPV[0], 2);
    //}
    //else { // append analysis of final position as comment
    //  char buf[MSG_SIZ];
    //  snprintf(buf, MSG_SIZ, "{final score %+4.2f/%d}", programStats.score/100., programStats.depth);
    //  AppendComment(currentMove, buf, 3); // the 3 prevents stripping of the score/depth!
    //}
    programStats.depth = 0;
  }

  if (currentMove >= forwardMostMove) {
    if(gameMode == AnalyzeFile) {
      if(appData.loadGameIndex == -1) {
        GameEnds(gameInfo.result, gameInfo.resultDetails ? gameInfo.resultDetails : "", GE_FILE);
        // ScheduleDelayedEvent(AnalyzeNextGame, 10);
      } else {
        ExitAnalyzeMode(); SendToProgram("force\n", &first);
      }
    }
    // gameMode = EndOfGame;
    // ModeHighlight();

    /* [AS] Clear current move marker at the end of a game */
    /* HistorySet(parseList, backwardMostMove, forwardMostMove, -1); */

    return FALSE;
  }

  toX = moveList[currentMove][2] - AAA;
  toY = moveList[currentMove][3] - ONE;

  if (moveList[currentMove][1] == '@') {
    if (appData.highlightLastMove) {
      SetHighlights(-1, -1, toX, toY);
    }
  } else {
    fromX = moveList[currentMove][0] - AAA;
    fromY = moveList[currentMove][1] - ONE;

    HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove); /* [AS] */

    if(moveList[currentMove][4] == ';') { // multi-leg
      killX = moveList[currentMove][5] - AAA;
      killY = moveList[currentMove][6] - ONE;
    }
    AnimateMove(boards[currentMove], fromX, fromY, toX, toY);
    killX = killY = -1;

    if (appData.highlightLastMove) {
      SetHighlights(fromX, fromY, toX, toY);
    }
  }
  DisplayMove(currentMove);
  SendMoveToProgram(currentMove++, &first);
  DisplayBothClocks();
  DrawPosition(FALSE, boards[currentMove]);
  // [HGM] PV info: always display, routine tests if empty
  DisplayComment(currentMove - 1, commentList[currentMove]);
  return TRUE;
}


int LoadGameOneMove (ChessMove readAhead)
{
  int fromX = 0, fromY = 0, toX = 0, toY = 0, done;
  char promoChar = NULLCHAR;
  ChessMove moveType;
  char move[MSG_SIZ];
  char *p, *q;

  if (gameMode != PlayFromGameFile && gameMode != AnalyzeFile &&
      gameMode != AnalyzeMode && gameMode != Training) {
    gameFileFP = NULL;
    return FALSE;
  }

  yyboardindex = forwardMostMove;
  if (readAhead != EndOfFile) {
    moveType = readAhead;
  } else {
    if (gameFileFP == NULL)
      return FALSE;
    moveType = (ChessMove) Myylex();
  }

  done = FALSE;
  switch (moveType) {
    case Comment:
      if (appData.debugMode)
        fprintf(debugFP, "Parsed Comment: %s\n", yy_text);
      p = yy_text;

      /* append the comment but don't display it */
      AppendComment(currentMove, p, FALSE);
      return TRUE;

    case WhiteCapturesEnPassant:
    case BlackCapturesEnPassant:
    case WhitePromotion:
    case BlackPromotion:
    case WhiteNonPromotion:
    case BlackNonPromotion:
    case NormalMove:
    case FirstLeg:
    case WhiteKingSideCastle:
    case WhiteQueenSideCastle:
    case BlackKingSideCastle:
    case BlackQueenSideCastle:
    case WhiteKingSideCastleWild:
    case WhiteQueenSideCastleWild:
    case BlackKingSideCastleWild:
    case BlackQueenSideCastleWild:
      /* PUSH Fabien */
    case WhiteHSideCastleFR:
    case WhiteASideCastleFR:
    case BlackHSideCastleFR:
    case BlackASideCastleFR:
      /* POP Fabien */
      if (appData.debugMode)
        fprintf(debugFP, "Parsed %s into %s virgin=%x,%x\n", yy_text, currentMoveString, boards[forwardMostMove][TOUCHED_W], boards[forwardMostMove][TOUCHED_B]);
      fromX = currentMoveString[0] - AAA;
      fromY = currentMoveString[1] - ONE;
      toX = currentMoveString[2] - AAA;
      toY = currentMoveString[3] - ONE;
      promoChar = currentMoveString[4];
      if(promoChar == ';') promoChar = currentMoveString[7];
      break;

    case WhiteDrop:
    case BlackDrop:
      if (appData.debugMode)
        fprintf(debugFP, "Parsed %s into %s\n", yy_text, currentMoveString);
      fromX = moveType == WhiteDrop ?
        (int) CharToPiece(ToUpper(currentMoveString[0])) :
        (int) CharToPiece(ToLower(currentMoveString[0]));
      fromY = DROP_RANK;
      toX = currentMoveString[2] - AAA;
      toY = currentMoveString[3] - ONE;
      break;

    case WhiteWins:
    case BlackWins:
    case GameIsDrawn:
    case GameUnfinished:
      if (appData.debugMode)
        fprintf(debugFP, "Parsed game end: %s\n", yy_text);
      p = strchr(yy_text, '{');
      if (p == NULL) p = strchr(yy_text, '(');
      if (p == NULL) {
        p = yy_text;
        if (p[0] == '0' || p[0] == '1' || p[0] == '*') p = "";
      } else {
        q = strchr(p, *p == '{' ? '}' : ')');
        if (q != NULL) *q = NULLCHAR;
        p++;
      }
      while(q = strchr(p, '\n')) *q = ' '; // [HGM] crush linefeeds in result message
      GameEnds(moveType, p, GE_FILE);
      done = TRUE;
      if (cmailMsgLoaded) {
        ClearHighlights();
        flipView = WhiteOnMove(currentMove);
        if (moveType == GameUnfinished) flipView = !flipView;
        if (appData.debugMode)
          fprintf(debugFP, "Setting flipView to %d\n", flipView) ;
      }
      break;

    case EndOfFile:
      if (appData.debugMode)
        fprintf(debugFP, "Parser hit end of file\n");
      switch (MateTest(boards[currentMove], PosFlags(currentMove)) ) {
        case MT_NONE:
        case MT_CHECK:
          break;
        case MT_CHECKMATE:
        case MT_STAINMATE:
          if (WhiteOnMove(currentMove)) {
            GameEnds(BlackWins, "Black mates", GE_FILE);
          } else {
            GameEnds(WhiteWins, "White mates", GE_FILE);
          }
          break;
        case MT_STALEMATE:
          GameEnds(GameIsDrawn, "Stalemate", GE_FILE);
          break;
      }
      done = TRUE;
      break;

    case MoveNumberOne:
      if (lastLoadGameStart == GNUChessGame) {
        /* GNUChessGames have numbers, but they aren't move numbers */
        if (appData.debugMode)
          fprintf(debugFP, "Parser ignoring: '%s' (%d)\n",
              yy_text, (int) moveType);
        return LoadGameOneMove(EndOfFile); /* tail recursion */
      }
      /* else fall thru */

    case XBoardGame:
    case GNUChessGame:
    case PGNTag:
      /* Reached start of next game in file */
      if (appData.debugMode)
        fprintf(debugFP, "Parsed start of next game: %s\n", yy_text);
      switch (MateTest(boards[currentMove], PosFlags(currentMove)) ) {
        case MT_NONE:
        case MT_CHECK:
          break;
        case MT_CHECKMATE:
        case MT_STAINMATE:
          if (WhiteOnMove(currentMove)) {
            GameEnds(BlackWins, "Black mates", GE_FILE);
          } else {
            GameEnds(WhiteWins, "White mates", GE_FILE);
          }
          break;
        case MT_STALEMATE:
          GameEnds(GameIsDrawn, "Stalemate", GE_FILE);
          break;
      }
      done = TRUE;
      break;

    case PositionDiagram:	/* should not happen; ignore */
    case ElapsedTime:		/* ignore */
    case NAG:                 /* ignore */
      if (appData.debugMode)
        fprintf(debugFP, "Parser ignoring: '%s' (%d)\n",
            yy_text, (int) moveType);
      return LoadGameOneMove(EndOfFile); /* tail recursion */

    case IllegalMove:
      if (appData.testLegality) {
        if (appData.debugMode)
          fprintf(debugFP, "Parsed IllegalMove: %s\n", yy_text);
        snprintf(move, MSG_SIZ, _("Illegal move: %d.%s%s"),
            (forwardMostMove / 2) + 1,
            WhiteOnMove(forwardMostMove) ? " " : ".. ", yy_text);
        DisplayError(move, 0);
        done = TRUE;
      } else {
        if (appData.debugMode)
          fprintf(debugFP, "Parsed %s into IllegalMove %s\n",
              yy_text, currentMoveString);
        if(currentMoveString[1] == '@') {
          fromX = CharToPiece(WhiteOnMove(currentMove) ? ToUpper(currentMoveString[0]) : ToLower(currentMoveString[0]));
          fromY = DROP_RANK;
        } else {
          fromX = currentMoveString[0] - AAA;
          fromY = currentMoveString[1] - ONE;
        }
        toX = currentMoveString[2] - AAA;
        toY = currentMoveString[3] - ONE;
        promoChar = currentMoveString[4];
      }
      break;

    case AmbiguousMove:
      if (appData.debugMode)
        fprintf(debugFP, "Parsed AmbiguousMove: %s\n", yy_text);
      snprintf(move, MSG_SIZ, _("Ambiguous move: %d.%s%s"),
          (forwardMostMove / 2) + 1,
          WhiteOnMove(forwardMostMove) ? " " : ".. ", yy_text);
      DisplayError(move, 0);
      done = TRUE;
      break;

    default:
    case ImpossibleMove:
      if (appData.debugMode)
        fprintf(debugFP, "Parsed ImpossibleMove (type = %d): %s\n", moveType, yy_text);
      snprintf(move, MSG_SIZ, _("Illegal move: %d.%s%s"),
          (forwardMostMove / 2) + 1,
          WhiteOnMove(forwardMostMove) ? " " : ".. ", yy_text);
      DisplayError(move, 0);
      done = TRUE;
      break;
  }

  if (done) {
    if (appData.matchMode || (appData.timeDelay == 0 && !pausing)) {
      DrawPosition(FALSE, boards[currentMove]);
      DisplayBothClocks();
      if (!appData.matchMode) // [HGM] PV info: routine tests if empty
        DisplayComment(currentMove - 1, commentList[currentMove]);
    }
    (void) StopLoadGameTimer();
    gameFileFP = NULL;
    cmailOldMove = forwardMostMove;
    return FALSE;
  } else {
    /* currentMoveString is set as a side-effect of yylex */

    thinkOutput[0] = NULLCHAR;
    MakeMove(fromX, fromY, toX, toY, promoChar);
    killX = killY = kill2X = kill2Y = -1; // [HGM] lion: used up
    currentMove = forwardMostMove;
    return TRUE;
  }
}

/* Load the nth game from the given file */
int LoadGameFromFile (char *filename, int n, char *title, int useList)
{
  FILE *f;
  char buf[MSG_SIZ];

  if (strcmp(filename, "-") == 0) {
    f = stdin;
    title = "stdin";
  } else {
    f = fopen(filename, "rb");
    if (f == NULL) {
      snprintf(buf, sizeof(buf),  _("Can't open \"%s\""), filename);
      DisplayError(buf, errno);
      return FALSE;
    }
  }
  if (fseek(f, 0, 0) == -1) {
    /* f is not seekable; probably a pipe */
    useList = FALSE;
  }
  if (useList && n == 0) {
    int error = GameListBuild(f);
    if (error) {
      DisplayError(_("Cannot build game list"), error);
    } else if (!ListEmpty(&gameList) &&
        ((ListGame *) gameList.tailPred)->number > 1) {
      GameListPopUp(f, title);
      return TRUE;
    }
    GameListDestroy();
    n = 1;
  }
  if (n == 0) n = 1;
  return LoadGame(f, n, title, FALSE);
}


void MakeRegisteredMove ()
{
  int fromX, fromY, toX, toY;
  char promoChar;
  if (cmailMoveRegistered[lastLoadGameNumber - 1]) {
    switch (cmailMoveType[lastLoadGameNumber - 1]) {
      case CMAIL_MOVE:
      case CMAIL_DRAW:
        if (appData.debugMode)
          fprintf(debugFP, "Restoring %s for game %d\n",
              cmailMove[lastLoadGameNumber - 1], lastLoadGameNumber);

        thinkOutput[0] = NULLCHAR;
        safeStrCpy(moveList[currentMove], cmailMove[lastLoadGameNumber - 1], sizeof(moveList[currentMove])/sizeof(moveList[currentMove][0]));
        fromX = cmailMove[lastLoadGameNumber - 1][0] - AAA;
        fromY = cmailMove[lastLoadGameNumber - 1][1] - ONE;
        toX = cmailMove[lastLoadGameNumber - 1][2] - AAA;
        toY = cmailMove[lastLoadGameNumber - 1][3] - ONE;
        promoChar = cmailMove[lastLoadGameNumber - 1][4];
        MakeMove(fromX, fromY, toX, toY, promoChar);
        ShowMove(fromX, fromY, toX, toY);

        switch (MateTest(boards[currentMove], PosFlags(currentMove)) ) {
          case MT_NONE:
          case MT_CHECK:
            break;

          case MT_CHECKMATE:
          case MT_STAINMATE:
            if (WhiteOnMove(currentMove)) {
              GameEnds(BlackWins, "Black mates", GE_PLAYER);
            } else {
              GameEnds(WhiteWins, "White mates", GE_PLAYER);
            }
            break;

          case MT_STALEMATE:
            GameEnds(GameIsDrawn, "Stalemate", GE_PLAYER);
            break;
        }

        break;

      case CMAIL_RESIGN:
        if (WhiteOnMove(currentMove)) {
          GameEnds(BlackWins, "White resigns", GE_PLAYER);
        } else {
          GameEnds(WhiteWins, "Black resigns", GE_PLAYER);
        }
        break;

      case CMAIL_ACCEPT:
        GameEnds(GameIsDrawn, "Draw agreed", GE_PLAYER);
        break;

      default:
        break;
    }
  }

  return;
}

/* Wrapper around LoadGame for use when a Cmail message is loaded */
int CmailLoadGame (FILE *f, int gameNumber, char *title, int useList)
{
  int retVal;

  if (gameNumber > nCmailGames) {
    DisplayError(_("No more games in this message"), 0);
    return FALSE;
  }
  if (f == lastLoadGameFP) {
    int offset = gameNumber - lastLoadGameNumber;
    if (offset == 0) {
      cmailMsg[0] = NULLCHAR;
      if (cmailMoveRegistered[lastLoadGameNumber - 1]) {
        cmailMoveRegistered[lastLoadGameNumber - 1] = FALSE;
        nCmailMovesRegistered--;
      }
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_MOVE;
      if (cmailResult[lastLoadGameNumber - 1] == CMAIL_NEW_RESULT) {
        cmailResult[lastLoadGameNumber - 1] = CMAIL_NOT_RESULT;
      }
    } else {
      if (! RegisterMove()) return FALSE;
    }
  }

  retVal = LoadGame(f, gameNumber, title, useList);

  /* Make move registered during previous look at this game, if any */
  MakeRegisteredMove();

  if (cmailCommentList[lastLoadGameNumber - 1] != NULL) {
    commentList[currentMove]
      = StrSave(cmailCommentList[lastLoadGameNumber - 1]);
    DisplayComment(currentMove - 1, commentList[currentMove]);
  }

  return retVal;
}

/* Support for LoadNextGame, LoadPreviousGame, ReloadSameGame */
int ReloadGame (int offset)
{
  int gameNumber = lastLoadGameNumber + offset;
  if (lastLoadGameFP == NULL) {
    DisplayError(_("No game has been loaded yet"), 0);
    return FALSE;
  }
  if (gameNumber <= 0) {
    DisplayError(_("Can't back up any further"), 0);
    return FALSE;
  }
  if (cmailMsgLoaded) {
    return CmailLoadGame(lastLoadGameFP, gameNumber,
        lastLoadGameTitle, lastLoadGameUseList);
  } else {
    return LoadGame(lastLoadGameFP, gameNumber,
        lastLoadGameTitle, lastLoadGameUseList);
  }
}

int keys[EmptySquare+1];

int PositionMatches (Board b1, Board b2)
{
  int r, f, sum=0;
  switch(appData.searchMode) {
    case 1: return CompareWithRights(b1, b2);
    case 2:
            for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
              if(b2[r][f] != EmptySquare && b1[r][f] != b2[r][f]) return FALSE;
            }
            return TRUE;
    case 3:
            for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
              if((b2[r][f] == WhitePawn || b2[r][f] == BlackPawn) && b1[r][f] != b2[r][f]) return FALSE;
              sum += keys[b1[r][f]] - keys[b2[r][f]];
            }
            return sum==0;
    case 4:
            for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
              sum += keys[b1[r][f]] - keys[b2[r][f]];
            }
            return sum==0;
  }
  return TRUE;
}

#define Q_PROMO  4
#define Q_EP     3
#define Q_BCASTL 2
#define Q_WCASTL 1

int pieceList[256], quickBoard[256];
ChessSquare pieceType[256] = { EmptySquare };
Board soughtBoard, reverseBoard, flipBoard, rotateBoard;
int counts[EmptySquare], minSought[EmptySquare], minReverse[EmptySquare], maxSought[EmptySquare], maxReverse[EmptySquare];
int soughtTotal, turn;
Boolean epOK, flipSearch;

typedef struct {
  unsigned char piece, to;
} Move;

#define DSIZE (250000)

Move initialSpace[DSIZE+1000]; // gamble on that game will not be more than 500 moves
Move *moveDatabase = initialSpace;
unsigned int movePtr, dataSize = DSIZE;

int MakePieceList (Board board, int *counts)
{
  int r, f, n=Q_PROMO, total=0;
  for(r=0;r<EmptySquare;r++) counts[r] = 0; // piece-type counts
  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
    int sq = f + (r<<4);
    if(board[r][f] == EmptySquare) quickBoard[sq] = 0; else {
      quickBoard[sq] = ++n;
      pieceList[n] = sq;
      pieceType[n] = board[r][f];
      counts[board[r][f]]++;
      if(board[r][f] == WhiteKing) pieceList[1] = n; else
        if(board[r][f] == BlackKing) pieceList[2] = n; // remember which are Kings, for castling
      total++;
    }
  }
  epOK = gameInfo.variant != VariantXiangqi && gameInfo.variant != VariantBerolina;
  return total;
}

void PackMove (int fromX, int fromY, int toX, int toY, ChessSquare promoPiece)
{
  int sq = fromX + (fromY<<4);
  int piece = quickBoard[sq], rook;
  quickBoard[sq] = 0;
  moveDatabase[movePtr].to = pieceList[piece] = sq = toX + (toY<<4);
  if(piece == pieceList[1] && fromY == toY) {
    if((toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
      int from = toX>fromX ? BOARD_RGHT-1 : BOARD_LEFT;
      moveDatabase[movePtr++].piece = Q_WCASTL;
      quickBoard[sq] = piece;
      piece = quickBoard[from]; quickBoard[from] = 0;
      moveDatabase[movePtr].to = pieceList[piece] = sq = toX>fromX ? sq-1 : sq+1;
    } else if((rook = quickBoard[sq]) && pieceType[rook] == WhiteRook) { // FRC castling
      quickBoard[sq] = 0; // remove Rook
      moveDatabase[movePtr].to = sq = (toX>fromX ? BOARD_RGHT-2 : BOARD_LEFT+2); // King to-square
      moveDatabase[movePtr++].piece = Q_WCASTL;
      quickBoard[sq] = pieceList[1]; // put King
      piece = rook;
      moveDatabase[movePtr].to = pieceList[rook] = sq = toX>fromX ? sq-1 : sq+1;
    }
  } else
    if(piece == pieceList[2] && fromY == toY) {
      if((toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
        int from = (toX>fromX ? BOARD_RGHT-1 : BOARD_LEFT) + (BOARD_HEIGHT-1 <<4);
        moveDatabase[movePtr++].piece = Q_BCASTL;
        quickBoard[sq] = piece;
        piece = quickBoard[from]; quickBoard[from] = 0;
        moveDatabase[movePtr].to = pieceList[piece] = sq = toX>fromX ? sq-1 : sq+1;
      } else if((rook = quickBoard[sq]) && pieceType[rook] == BlackRook) { // FRC castling
        quickBoard[sq] = 0; // remove Rook
        moveDatabase[movePtr].to = sq = (toX>fromX ? BOARD_RGHT-2 : BOARD_LEFT+2);
        moveDatabase[movePtr++].piece = Q_BCASTL;
        quickBoard[sq] = pieceList[2]; // put King
        piece = rook;
        moveDatabase[movePtr].to = pieceList[rook] = sq = toX>fromX ? sq-1 : sq+1;
      }
    } else
      if(epOK && (pieceType[piece] == WhitePawn || pieceType[piece] == BlackPawn) && fromX != toX && quickBoard[sq] == 0) {
        quickBoard[(fromY<<4)+toX] = 0;
        moveDatabase[movePtr].piece = Q_EP;
        moveDatabase[movePtr++].to = (fromY<<4)+toX;
        moveDatabase[movePtr].to = sq;
      } else
        if(promoPiece != pieceType[piece]) {
          moveDatabase[movePtr++].piece = Q_PROMO;
          moveDatabase[movePtr].to = pieceType[piece] = (int) promoPiece;
        }
  moveDatabase[movePtr].piece = piece;
  quickBoard[sq] = piece;
  movePtr++;
}

int PackGame (Board board)
{
  Move *newSpace = NULL;
  moveDatabase[movePtr].piece = 0; // terminate previous game
  if(movePtr > dataSize) {
    if(appData.debugMode) fprintf(debugFP, "move-cache overflow, enlarge to %d MB\n", dataSize/128);
    dataSize *= 8; // increase size by factor 8 (512KB -> 4MB -> 32MB -> 256MB -> 2GB)
    if(dataSize) newSpace = (Move*) calloc(dataSize + 1000, sizeof(Move));
    if(newSpace) {
      int i;
      Move *p = moveDatabase, *q = newSpace;
      for(i=0; i<movePtr; i++) *q++ = *p++;    // copy to newly allocated space
      if(dataSize > 8*DSIZE) free(moveDatabase); // and free old space (if it was allocated)
      moveDatabase = newSpace;
    } else { // calloc failed, we must be out of memory. Too bad...
      dataSize = 0; // prevent calloc events for all subsequent games
      return 0;     // and signal this one isn't cached
    }
  }
  movePtr++;
  MakePieceList(board, counts);
  return movePtr;
}

int QuickCompare (Board board, int *minCounts, int *maxCounts)
{   // compare according to search mode
  int r, f;
  switch(appData.searchMode)
  {
    case 1: // exact position match
      if(!(turn & board[EP_STATUS-1])) return FALSE; // wrong side to move
      for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
        if(board[r][f] != pieceType[quickBoard[(r<<4)+f]]) return FALSE;
      }
      break;
    case 2: // can have extra material on empty squares
      for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
        if(board[r][f] == EmptySquare) continue;
        if(board[r][f] != pieceType[quickBoard[(r<<4)+f]]) return FALSE;
      }
      break;
    case 3: // material with exact Pawn structure
      for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
        if(board[r][f] != WhitePawn && board[r][f] != BlackPawn) continue;
        if(board[r][f] != pieceType[quickBoard[(r<<4)+f]]) return FALSE;
      } // fall through to material comparison
    case 4: // exact material
      for(r=0; r<EmptySquare; r++) if(counts[r] != maxCounts[r]) return FALSE;
      break;
    case 6: // material range with given imbalance
      for(r=0; r<BlackPawn; r++) if(counts[r] - minCounts[r] != counts[r+BlackPawn] - minCounts[r+BlackPawn]) return FALSE;
      // fall through to range comparison
    case 5: // material range
      for(r=0; r<EmptySquare; r++) if(counts[r] < minCounts[r] || counts[r] > maxCounts[r]) return FALSE;
  }
  return TRUE;
}

int QuickScan (Board board, Move *move)
{   // reconstruct game,and compare all positions in it
  int cnt=0, stretch=0, found = -1, total = MakePieceList(board, counts);
  do {
    int piece = move->piece;
    int to = move->to, from = pieceList[piece];
    if(found < 0) { // if already found just scan to game end for final piece count
      if(QuickCompare(soughtBoard, minSought, maxSought) ||
          appData.ignoreColors && QuickCompare(reverseBoard, minReverse, maxReverse) ||
          flipSearch && (QuickCompare(flipBoard, minSought, maxSought) ||
            appData.ignoreColors && QuickCompare(rotateBoard, minReverse, maxReverse))
        ) {
        static int lastCounts[EmptySquare+1];
        int i;
        if(stretch) for(i=0; i<EmptySquare; i++) if(lastCounts[i] != counts[i]) { stretch = 0; break; } // reset if material changes
        if(stretch++ == 0) for(i=0; i<EmptySquare; i++) lastCounts[i] = counts[i]; // remember actual material
      } else stretch = 0;
      if(stretch && (appData.searchMode == 1 || stretch >= appData.stretch)) found = cnt + 1 - stretch;
      if(found >= 0 && !appData.minPieces) return found;
    }
    if(piece <= Q_PROMO) { // special moves encoded by otherwise invalid piece numbers 1-4
      if(!piece) return (appData.minPieces && (total < appData.minPieces || total > appData.maxPieces) ? -1 : found);
      if(piece == Q_PROMO) { // promotion, encoded as (Q_PROMO, to) + (piece, promoType)
        piece = (++move)->piece;
        from = pieceList[piece];
        counts[pieceType[piece]]--;
        pieceType[piece] = (ChessSquare) move->to;
        counts[move->to]++;
      } else if(piece == Q_EP) { // e.p. capture, encoded as (Q_EP, ep-sqr) + (piece, to)
        counts[pieceType[quickBoard[to]]]--;
        quickBoard[to] = 0; total--;
        move++;
        continue;
      } else if(piece <= Q_BCASTL) { // castling, encoded as (Q_XCASTL, king-to) + (rook, rook-to)
        piece = pieceList[piece]; // first two elements of pieceList contain King numbers
        from  = pieceList[piece]; // so this must be King
        quickBoard[from] = 0;
        pieceList[piece] = to;
        from = pieceList[(++move)->piece]; // for FRC this has to be done here
        quickBoard[from] = 0; // rook
        quickBoard[to] = piece;
        to = move->to; piece = move->piece;
        goto aftercastle;
      }
    }
    if(appData.searchMode > 2) counts[pieceType[quickBoard[to]]]--; // account capture
    if((total -= (quickBoard[to] != 0)) < soughtTotal && found < 0) return -1; // piece count dropped below what we search for
    quickBoard[from] = 0;
aftercastle:
    quickBoard[to] = piece;
    pieceList[piece] = to;
    cnt++; turn ^= 3;
    move++;
  } while(1);
}

void InitSearch ()
{
  int r, f;
  flipSearch = FALSE;
  CopyBoard(soughtBoard, boards[currentMove]);
  soughtTotal = MakePieceList(soughtBoard, maxSought);
  soughtBoard[EP_STATUS-1] = (currentMove & 1) + 1;
  if(currentMove == 0 && gameMode == EditPosition) soughtBoard[EP_STATUS-1] = blackPlaysFirst + 1; // (!)
  CopyBoard(reverseBoard, boards[currentMove]);
  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
    int piece = boards[currentMove][BOARD_HEIGHT-1-r][f];
    if(piece < BlackPawn) piece += BlackPawn; else if(piece < EmptySquare) piece -= BlackPawn; // color-flip
    reverseBoard[r][f] = piece;
  }
  reverseBoard[EP_STATUS-1] = soughtBoard[EP_STATUS-1] ^ 3;
  for(r=0; r<6; r++) reverseBoard[CASTLING][r] = boards[currentMove][CASTLING][(r+3)%6];
  if(appData.findMirror && appData.searchMode <= 3 && (!nrCastlingRights
        || (boards[currentMove][CASTLING][2] == NoRights ||
          boards[currentMove][CASTLING][0] == NoRights && boards[currentMove][CASTLING][1] == NoRights )
        && (boards[currentMove][CASTLING][5] == NoRights ||
          boards[currentMove][CASTLING][3] == NoRights && boards[currentMove][CASTLING][4] == NoRights ) )
    ) {
    flipSearch = TRUE;
    CopyBoard(flipBoard, soughtBoard);
    CopyBoard(rotateBoard, reverseBoard);
    for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
      flipBoard[r][f]    = soughtBoard[r][BOARD_WIDTH-1-f];
      rotateBoard[r][f] = reverseBoard[r][BOARD_WIDTH-1-f];
    }
  }
  for(r=0; r<BlackPawn; r++) maxReverse[r] = maxSought[r+BlackPawn], maxReverse[r+BlackPawn] = maxSought[r];
  if(appData.searchMode >= 5) {
    for(r=BOARD_HEIGHT/2; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) soughtBoard[r][f] = EmptySquare;
    MakePieceList(soughtBoard, minSought);
    for(r=0; r<BlackPawn; r++) minReverse[r] = minSought[r+BlackPawn], minReverse[r+BlackPawn] = minSought[r];
  }
  if(gameInfo.variant == VariantCrazyhouse || gameInfo.variant == VariantShogi || gameInfo.variant == VariantBughouse)
    soughtTotal = 0; // in drop games nr of pieces does not fall monotonously
}

GameInfo dummyInfo;
static int creatingBook;

int GameContainsPosition (FILE *f, ListGame *lg)
{
  int next, btm=0, plyNr=0, scratch=forwardMostMove+2&~1;
  int fromX, fromY, toX, toY;
  char promoChar;
  static int initDone=FALSE;

  // weed out games based on numerical tag comparison
  if(lg->gameInfo.variant != gameInfo.variant) return -1; // wrong variant
  if(appData.eloThreshold1 && (lg->gameInfo.whiteRating < appData.eloThreshold1 && lg->gameInfo.blackRating < appData.eloThreshold1)) return -1;
  if(appData.eloThreshold2 && (lg->gameInfo.whiteRating < appData.eloThreshold2 || lg->gameInfo.blackRating < appData.eloThreshold2)) return -1;
  if(appData.dateThreshold && (!lg->gameInfo.date || atoi(lg->gameInfo.date) < appData.dateThreshold)) return -1;
  if(!initDone) {
    for(next = WhitePawn; next<EmptySquare; next++) keys[next] = random()>>8 ^ random()<<6 ^random()<<20;
    initDone = TRUE;
  }
  if(lg->gameInfo.fen) ParseFEN(boards[scratch], &btm, lg->gameInfo.fen, FALSE);
  else CopyBoard(boards[scratch], initialPosition); // default start position
  if(lg->moves) {
    turn = btm + 1;
    if((next = QuickScan( boards[scratch], &moveDatabase[lg->moves] )) < 0) return -1; // quick scan rules out it is there
    if(appData.searchMode >= 4) return next; // for material searches, trust QuickScan.
  }
  if(btm) plyNr++;
  if(PositionMatches(boards[scratch], boards[currentMove])) return plyNr;
  fseek(f, lg->offset, 0);
  yynewfile(f);
  while(1) {
    yyboardindex = scratch;
    quickFlag = plyNr+1;
    next = Myylex();
    quickFlag = 0;
    switch(next) {
      case PGNTag:
        if(plyNr) return -1; // after we have seen moves, any tags will be start of next game
      default:
        continue;

      case XBoardGame:
      case GNUChessGame:
        if(plyNr) return -1; // after we have seen moves, this is for new game
        continue;

      case AmbiguousMove: // we cannot reconstruct the game beyond these two
      case ImpossibleMove:
      case WhiteWins: // game ends here with these four
      case BlackWins:
      case GameIsDrawn:
      case GameUnfinished:
        return -1;

      case IllegalMove:
        if(appData.testLegality) return -1;
      case WhiteCapturesEnPassant:
      case BlackCapturesEnPassant:
      case WhitePromotion:
      case BlackPromotion:
      case WhiteNonPromotion:
      case BlackNonPromotion:
      case NormalMove:
      case FirstLeg:
      case WhiteKingSideCastle:
      case WhiteQueenSideCastle:
      case BlackKingSideCastle:
      case BlackQueenSideCastle:
      case WhiteKingSideCastleWild:
      case WhiteQueenSideCastleWild:
      case BlackKingSideCastleWild:
      case BlackQueenSideCastleWild:
      case WhiteHSideCastleFR:
      case WhiteASideCastleFR:
      case BlackHSideCastleFR:
      case BlackASideCastleFR:
        fromX = currentMoveString[0] - AAA;
        fromY = currentMoveString[1] - ONE;
        toX = currentMoveString[2] - AAA;
        toY = currentMoveString[3] - ONE;
        promoChar = currentMoveString[4];
        break;
      case WhiteDrop:
      case BlackDrop:
        fromX = next == WhiteDrop ?
          (int) CharToPiece(ToUpper(currentMoveString[0])) :
          (int) CharToPiece(ToLower(currentMoveString[0]));
        fromY = DROP_RANK;
        toX = currentMoveString[2] - AAA;
        toY = currentMoveString[3] - ONE;
        promoChar = 0;
        break;
    }
    // Move encountered; peform it. We need to shuttle between two boards, as even/odd index determines side to move
    plyNr++;
    ApplyMove(fromX, fromY, toX, toY, promoChar, boards[scratch]);
    if(PositionMatches(boards[scratch], boards[currentMove])) return plyNr;
    if(appData.ignoreColors && PositionMatches(boards[scratch], reverseBoard)) return plyNr;
    if(appData.findMirror) {
      if(PositionMatches(boards[scratch], flipBoard)) return plyNr;
      if(appData.ignoreColors && PositionMatches(boards[scratch], rotateBoard)) return plyNr;
    }
  }
}

/* Load the nth game from open file f */
int LoadGame (FILE *f, int gameNumber, char *title, int useList)
{
  ChessMove cm;
  char buf[MSG_SIZ];
  int gn = gameNumber;
  ListGame *lg = NULL;
  int numPGNTags = 0, i;
  int err, pos = -1;
  GameMode oldGameMode;
  VariantClass v, oldVariant = gameInfo.variant; /* [HGM] PGNvariant */
  char oldName[MSG_SIZ];

  safeStrCpy(oldName, engineVariant, MSG_SIZ); v = oldVariant;

  if (appData.debugMode)
    fprintf(debugFP, "LoadGame(): on entry, gameMode %d\n", gameMode);

  if (gameMode == Training )
    SetTrainingModeOff();

  oldGameMode = gameMode;
  if (gameMode != BeginningOfGame) {
    Reset(FALSE, TRUE);
  }
  killX = killY = kill2X = kill2Y = -1; // [HGM] lion: in case we did not Reset

  gameFileFP = f;
  if (lastLoadGameFP != NULL && lastLoadGameFP != f) {
    fclose(lastLoadGameFP);
  }

  if (useList) {
    lg = (ListGame *) ListElem(&gameList, gameNumber-1);

    if (lg) {
      fseek(f, lg->offset, 0);
      GameListHighlight(gameNumber);
      pos = lg->position;
      gn = 1;
    }
    else {
      if(oldGameMode == AnalyzeFile && appData.loadGameIndex == -1)
        appData.loadGameIndex = 0; // [HGM] suppress error message if we reach file end after auto-stepping analysis
      else
        DisplayError(_("Game number out of range"), 0);
      return FALSE;
    }
  } else {
    GameListDestroy();
    if (fseek(f, 0, 0) == -1) {
      if (f == lastLoadGameFP ?
          gameNumber == lastLoadGameNumber + 1 :
          gameNumber == 1) {
        gn = 1;
      } else {
        DisplayError(_("Can't seek on game file"), 0);
        return FALSE;
      }
    }
  }
  lastLoadGameFP = f;
  lastLoadGameNumber = gameNumber;
  safeStrCpy(lastLoadGameTitle, title, sizeof(lastLoadGameTitle)/sizeof(lastLoadGameTitle[0]));
  lastLoadGameUseList = useList;

  yynewfile(f);

  if (lg && lg->gameInfo.white && lg->gameInfo.black) {
    snprintf(buf, sizeof(buf), "%s %s %s", lg->gameInfo.white, _("vs."),
        lg->gameInfo.black);
    DisplayTitle(buf);
  } else if (*title != NULLCHAR) {
    if (gameNumber > 1) {
      snprintf(buf, MSG_SIZ, "%s %d", title, gameNumber);
      DisplayTitle(buf);
    } else {
      DisplayTitle(title);
    }
  }

  //if (gameMode != AnalyzeFile && gameMode != AnalyzeMode) {
  gameMode = PlayFromGameFile;
  ModeHighlight();
  //}

  currentMove = forwardMostMove = backwardMostMove = 0;
  CopyBoard(boards[0], initialPosition);
  StopClocks();

  /*
   * Skip the first gn-1 games in the file.
   * Also skip over anything that precedes an identifiable
   * start of game marker, to avoid being confused by
   * garbage at the start of the file.  Currently
   * recognized start of game markers are the move number "1",
   * the pattern "gnuchess .* game", the pattern
   * "^[#;%] [^ ]* game file", and a PGN tag block.
   * A game that starts with one of the latter two patterns
   * will also have a move number 1, possibly
   * following a position diagram.
   * 5-4-02: Let's try being more lenient and allowing a game to
   * start with an unnumbered move.  Does that break anything?
   */
  cm = lastLoadGameStart = EndOfFile;
  while (gn > 0) {
    yyboardindex = forwardMostMove;
    cm = (ChessMove) Myylex();
    switch (cm) {
      case EndOfFile:
        if (cmailMsgLoaded) {
          nCmailGames = CMAIL_MAX_GAMES - gn;
        } else {
          Reset(TRUE, TRUE);
          DisplayError(_("Game not found in file"), 0);
        }
        return FALSE;

      case GNUChessGame:
      case XBoardGame:
        gn--;
        lastLoadGameStart = cm;
        break;

      case MoveNumberOne:
        switch (lastLoadGameStart) {
          case GNUChessGame:
          case XBoardGame:
          case PGNTag:
            break;
          case MoveNumberOne:
          case EndOfFile:
            gn--;		/* count this game */
            lastLoadGameStart = cm;
            break;
          default:
            /* impossible */
            break;
        }
        break;

      case PGNTag:
        switch (lastLoadGameStart) {
          case GNUChessGame:
          case PGNTag:
          case MoveNumberOne:
          case EndOfFile:
            gn--;		/* count this game */
            lastLoadGameStart = cm;
            break;
          case XBoardGame:
            lastLoadGameStart = cm; /* game counted already */
            break;
          default:
            /* impossible */
            break;
        }
        if (gn > 0) {
          do {
            yyboardindex = forwardMostMove;
            cm = (ChessMove) Myylex();
          } while (cm == PGNTag || cm == Comment);
        }
        break;

      case WhiteWins:
      case BlackWins:
      case GameIsDrawn:
        if (cmailMsgLoaded && (CMAIL_MAX_GAMES == lastLoadGameNumber)) {
          if (   cmailResult[CMAIL_MAX_GAMES - gn - 1]
              != CMAIL_OLD_RESULT) {
            nCmailResults ++ ;
            cmailResult[  CMAIL_MAX_GAMES
              - gn - 1] = CMAIL_OLD_RESULT;
          }
        }
        break;

      case NormalMove:
      case FirstLeg:
        /* Only a NormalMove can be at the start of a game
         * without a position diagram. */
        if (lastLoadGameStart == EndOfFile ) {
          gn--;
          lastLoadGameStart = MoveNumberOne;
        }
        break;

      default:
        break;
    }
  }

  if (appData.debugMode)
    fprintf(debugFP, "Parsed game start '%s' (%d)\n", yy_text, (int) cm);

  for(i=0; i<EmptySquare; i++) { FREE(pieceDesc[i]); pieceDesc[i] = NULL; } // reset VariantMen

  if (cm == XBoardGame) {
    /* Skip any header junk before position diagram and/or move 1 */
    for (;;) {
      yyboardindex = forwardMostMove;
      cm = (ChessMove) Myylex();

      if (cm == EndOfFile ||
          cm == GNUChessGame || cm == XBoardGame) {
        /* Empty game; pretend end-of-file and handle later */
        cm = EndOfFile;
        break;
      }

      if (cm == MoveNumberOne || cm == PositionDiagram ||
          cm == PGNTag || cm == Comment)
        break;
    }
  } else if (cm == GNUChessGame) {
    if (gameInfo.event != NULL) {
      free(gameInfo.event);
    }
    gameInfo.event = StrSave(yy_text);
  }

  startedFromSetupPosition = startedFromPositionFile; // [HGM]
  while (cm == PGNTag) {
    if (appData.debugMode)
      fprintf(debugFP, "Parsed PGNTag: %s\n", yy_text);
    err = ParsePGNTag(yy_text, &gameInfo);
    if (!err) numPGNTags++;

    /* [HGM] PGNvariant: automatically switch to variant given in PGN tag */
    if(gameInfo.variant != oldVariant && (gameInfo.variant != VariantNormal || gameInfo.variantName == NULL || *gameInfo.variantName == NULLCHAR)) {
      startedFromPositionFile = FALSE; /* [HGM] loadPos: variant switch likely makes position invalid */
      ResetFrontEnd(); // [HGM] might need other bitmaps. Cannot use Reset() because it clears gameInfo :-(
      InitPosition(TRUE);
      oldVariant = gameInfo.variant;
      if (appData.debugMode)
        fprintf(debugFP, "New variant %d\n", (int) oldVariant);
    }


    if (gameInfo.fen != NULL) {
      Board initial_position;
      startedFromSetupPosition = TRUE;
      if (!ParseFEN(initial_position, &blackPlaysFirst, gameInfo.fen, TRUE)) {
        Reset(TRUE, TRUE);
        DisplayError(_("Bad FEN position in file"), 0);
        return FALSE;
      }
      CopyBoard(boards[0], initial_position);
      if(*engineVariant || gameInfo.variant == VariantFairy) // [HGM] for now, assume FEN in engine-defined variant game is default initial position
        CopyBoard(initialPosition, initial_position);
      if (blackPlaysFirst) {
        currentMove = forwardMostMove = backwardMostMove = 1;
        CopyBoard(boards[1], initial_position);
        safeStrCpy(moveList[0], "", sizeof(moveList[0])/sizeof(moveList[0][0]));
        safeStrCpy(parseList[0], "", sizeof(parseList[0])/sizeof(parseList[0][0]));
        timeRemaining[0][1] = whiteTimeRemaining;
        timeRemaining[1][1] = blackTimeRemaining;
        if (commentList[0] != NULL) {
          commentList[1] = commentList[0];
          commentList[0] = NULL;
        }
      } else {
        currentMove = forwardMostMove = backwardMostMove = 0;
      }
      /* [HGM] copy FEN attributes as well. Bugfix 4.3.14m and 4.3.15e: moved to after 'blackPlaysFirst' */
      {   int i;
        initialRulePlies = FENrulePlies;
        for( i=0; i< nrCastlingRights; i++ )
          initialRights[i] = initial_position[CASTLING][i];
      }
      yyboardindex = forwardMostMove;
      free(gameInfo.fen);
      gameInfo.fen = NULL;
    }

    yyboardindex = forwardMostMove;
    cm = (ChessMove) Myylex();

    /* Handle comments interspersed among the tags */
    while (cm == Comment) {
      char *p;
      if (appData.debugMode)
        fprintf(debugFP, "Parsed Comment: %s\n", yy_text);
      p = yy_text;
      AppendComment(currentMove, p, FALSE);
      yyboardindex = forwardMostMove;
      cm = (ChessMove) Myylex();
    }
  }

  /* don't rely on existence of Event tag since if game was
   * pasted from clipboard the Event tag may not exist
   */
  if (numPGNTags > 0){
    char *tags;
    if (gameInfo.variant == VariantNormal) {
      VariantClass v = StringToVariant(gameInfo.event);
      // [HGM] do not recognize variants from event tag that were introduced after supporting variant tag
      if(v < VariantShogi) gameInfo.variant = v;
    }
    if (!matchMode) {
      if( appData.autoDisplayTags ) {
        tags = PGNTags(&gameInfo);
        TagsPopUp(tags, CmailMsg());
        free(tags);
      }
    }
  } else {
    /* Make something up, but don't display it now */
    SetGameInfo();
    TagsPopDown();
  }

  if (cm == PositionDiagram) {
    int i, j;
    char *p;
    Board initial_position;

    if (appData.debugMode)
      fprintf(debugFP, "Parsed PositionDiagram: %s\n", yy_text);

    if (!startedFromSetupPosition) {
      p = yy_text;
      for (i = BOARD_HEIGHT - 1; i >= 0; i--)
        for (j = BOARD_LEFT; j < BOARD_RGHT; p++)
          switch (*p) {
            case '{':
            case '[':
            case '-':
            case ' ':
            case '\t':
            case '\n':
            case '\r':
              break;
            default:
              initial_position[i][j++] = CharToPiece(*p);
              break;
          }
      while (*p == ' ' || *p == '\t' ||
          *p == '\n' || *p == '\r') p++;

      if (strncmp(p, "black", strlen("black"))==0)
        blackPlaysFirst = TRUE;
      else
        blackPlaysFirst = FALSE;
      startedFromSetupPosition = TRUE;

      CopyBoard(boards[0], initial_position);
      if (blackPlaysFirst) {
        currentMove = forwardMostMove = backwardMostMove = 1;
        CopyBoard(boards[1], initial_position);
        safeStrCpy(moveList[0], "", sizeof(moveList[0])/sizeof(moveList[0][0]));
        safeStrCpy(parseList[0], "", sizeof(parseList[0])/sizeof(parseList[0][0]));
        timeRemaining[0][1] = whiteTimeRemaining;
        timeRemaining[1][1] = blackTimeRemaining;
        if (commentList[0] != NULL) {
          commentList[1] = commentList[0];
          commentList[0] = NULL;
        }
      } else {
        currentMove = forwardMostMove = backwardMostMove = 0;
      }
    }
    yyboardindex = forwardMostMove;
    cm = (ChessMove) Myylex();
  }

  if(!creatingBook) {
    if (first.pr == NoProc) {
      StartChessProgram(&first);
    }
    InitChessProgram(&first, FALSE);
    if(gameInfo.variant == VariantUnknown && *oldName) {
      safeStrCpy(engineVariant, oldName, MSG_SIZ);
      gameInfo.variant = v;
    }
    SendToProgram("force\n", &first);
    if (startedFromSetupPosition) {
      SendBoard(&first, forwardMostMove);
      if (appData.debugMode) {
        fprintf(debugFP, "Load Game\n");
      }
      DisplayBothClocks();
    }
  }

  /* [HGM] server: flag to write setup moves in broadcast file as one */
  loadFlag = appData.suppressLoadMoves;

  while (cm == Comment) {
    char *p;
    if (appData.debugMode)
      fprintf(debugFP, "Parsed Comment: %s\n", yy_text);
    p = yy_text;
    AppendComment(currentMove, p, FALSE);
    yyboardindex = forwardMostMove;
    cm = (ChessMove) Myylex();
  }

  if ((cm == EndOfFile && lastLoadGameStart != EndOfFile ) ||
      cm == WhiteWins || cm == BlackWins ||
      cm == GameIsDrawn || cm == GameUnfinished) {
    DisplayMessage("", _("No moves in game"));
    if (cmailMsgLoaded) {
      if (appData.debugMode)
        fprintf(debugFP, "Setting flipView to %d.\n", FALSE);
      ClearHighlights();
      flipView = FALSE;
    }
    DrawPosition(FALSE, boards[currentMove]);
    DisplayBothClocks();
    gameMode = EditGame;
    ModeHighlight();
    gameFileFP = NULL;
    cmailOldMove = 0;
    return TRUE;
  }

  // [HGM] PV info: routine tests if comment empty
  if (!matchMode && (pausing || appData.timeDelay != 0)) {
    DisplayComment(currentMove - 1, commentList[currentMove]);
  }
  if (!matchMode && appData.timeDelay != 0)
    DrawPosition(FALSE, boards[currentMove]);

  if (gameMode == AnalyzeFile || gameMode == AnalyzeMode) {
    programStats.ok_to_send = 1;
  }

  /* if the first token after the PGN tags is a move
   * and not move number 1, retrieve it from the parser
   */
  if (cm != MoveNumberOne)
    LoadGameOneMove(cm);

  /* load the remaining moves from the file */
  while (LoadGameOneMove(EndOfFile)) {
    timeRemaining[0][forwardMostMove] = whiteTimeRemaining;
    timeRemaining[1][forwardMostMove] = blackTimeRemaining;
  }

  /* rewind to the start of the game */
  currentMove = backwardMostMove;

  HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);

  // if (oldGameMode == AnalyzeFile) {
  //   appData.loadGameIndex = -1; // [HGM] order auto-stepping through games
  //   AnalyzeFileEvent();
  // } else if (oldGameMode == AnalyzeMode) {
  //   AnalyzeFileEvent();
  // }

  if(gameInfo.result == GameUnfinished && gameInfo.resultDetails && appData.clockMode) {
    long int w, b; // [HGM] adjourn: restore saved clock times
    char *p = strstr(gameInfo.resultDetails, "(Clocks:");
    if(p && sscanf(p+8, "%ld,%ld", &w, &b) == 2) {
      timeRemaining[0][forwardMostMove] = whiteTimeRemaining = 1000*w + 500;
      timeRemaining[1][forwardMostMove] = blackTimeRemaining = 1000*b + 500;
    }
  }

  if(creatingBook) return TRUE;
  if (!matchMode && pos > 0) {
    ToNrEvent(pos); // [HGM] no autoplay if selected on position
  } else
    if (matchMode || appData.timeDelay == 0) {
      ToEndEvent();
    } else if (appData.timeDelay > 0) {
      //AutoPlayGameLoop();
    }

  if (appData.debugMode)
    fprintf(debugFP, "LoadGame(): on exit, gameMode %d\n", gameMode);

  loadFlag = 0; /* [HGM] true game starts */
  return TRUE;
}

/* Support for LoadNextPosition, LoadPreviousPosition, ReloadSamePosition */
int ReloadPosition (int offset)
{
  int positionNumber = lastLoadPositionNumber + offset;
  if (lastLoadPositionFP == NULL) {
    DisplayError(_("No position has been loaded yet"), 0);
    return FALSE;
  }
  if (positionNumber <= 0) {
    DisplayError(_("Can't back up any further"), 0);
    return FALSE;
  }
  return LoadPosition(lastLoadPositionFP, positionNumber,
      lastLoadPositionTitle);
}

/* Load the nth position from the given file */
int LoadPositionFromFile (char *filename, int n, char *title)
{
  FILE *f;
  char buf[MSG_SIZ];

  if (strcmp(filename, "-") == 0) {
    return LoadPosition(stdin, n, "stdin");
  } else {
    f = fopen(filename, "rb");
    if (f == NULL) {
      snprintf(buf, sizeof(buf), _("Can't open \"%s\""), filename);
      DisplayError(buf, errno);
      return FALSE;
    } else {
      return LoadPosition(f, n, title);
    }
  }
}

/* Load the nth position from the given open file, and close it */
int LoadPosition (FILE *f, int positionNumber, char *title)
{
  char *p, line[MSG_SIZ];
  Board initial_position;
  int i, j, fenMode, pn;

  if (gameMode == Training )
    SetTrainingModeOff();

  if (gameMode != BeginningOfGame) {
    Reset(FALSE, TRUE);
  }
  if (lastLoadPositionFP != NULL && lastLoadPositionFP != f) {
    fclose(lastLoadPositionFP);
  }
  if (positionNumber == 0) positionNumber = 1;
  lastLoadPositionFP = f;
  lastLoadPositionNumber = positionNumber;
  safeStrCpy(lastLoadPositionTitle, title, sizeof(lastLoadPositionTitle)/sizeof(lastLoadPositionTitle[0]));
  if (first.pr == NoProc && !appData.noChessProgram) {
    StartChessProgram(&first);
    InitChessProgram(&first, FALSE);
  }
  pn = positionNumber;
  if (positionNumber < 0) {
    /* Negative position number means to seek to that byte offset */
    if (fseek(f, -positionNumber, 0) == -1) {
      DisplayError(_("Can't seek on position file"), 0);
      return FALSE;
    };
    pn = 1;
  } else {
    if (fseek(f, 0, 0) == -1) {
      if (f == lastLoadPositionFP ?
          positionNumber == lastLoadPositionNumber + 1 :
          positionNumber == 1) {
        pn = 1;
      } else {
        DisplayError(_("Can't seek on position file"), 0);
        return FALSE;
      }
    }
  }
  /* See if this file is FEN or old-style xboard */
  if (fgets(line, MSG_SIZ, f) == NULL) {
    DisplayError(_("Position not found in file"), 0);
    return FALSE;
  }
  // [HGM] FEN can begin with digit, any piece letter valid in this variant, or a + for Shogi promoted pieces (or * for blackout)
  fenMode = line[0] >= '0' && line[0] <= '9' || line[0] == '+' || line[0] == '*' || CharToPiece(line[0]) != EmptySquare;

  if (pn >= 2) {
    if (fenMode || line[0] == '#') pn--;
    while (pn > 0) {
      /* skip positions before number pn */
      if (fgets(line, MSG_SIZ, f) == NULL) {
        Reset(TRUE, TRUE);
        DisplayError(_("Position not found in file"), 0);
        return FALSE;
      }
      if (fenMode || line[0] == '#') pn--;
    }
  }

  if (fenMode) {
    char *p;
    if (!ParseFEN(initial_position, &blackPlaysFirst, line, TRUE)) {
      DisplayError(_("Bad FEN position in file"), 0);
      return FALSE;
    }
    if((strchr(line, ';')) && (p = strstr(line, " bm "))) { // EPD with best move
      sscanf(p+4, "%[^;]", bestMove);
    } else *bestMove = NULLCHAR;
    if((strchr(line, ';')) && (p = strstr(line, " am "))) { // EPD with avoid move
      sscanf(p+4, "%[^;]", avoidMove);
    } else *avoidMove = NULLCHAR;
  } else {
    (void) fgets(line, MSG_SIZ, f);
    (void) fgets(line, MSG_SIZ, f);

    for (i = BOARD_HEIGHT - 1; i >= 0; i--) {
      (void) fgets(line, MSG_SIZ, f);
      for (p = line, j = BOARD_LEFT; j < BOARD_RGHT; p++) {
        if (*p == ' ')
          continue;
        initial_position[i][j++] = CharToPiece(*p);
      }
    }

    blackPlaysFirst = FALSE;
    if (!feof(f)) {
      (void) fgets(line, MSG_SIZ, f);
      if (strncmp(line, "black", strlen("black"))==0)
        blackPlaysFirst = TRUE;
    }
  }
  startedFromSetupPosition = TRUE;

  CopyBoard(boards[0], initial_position);
  if (blackPlaysFirst) {
    currentMove = forwardMostMove = backwardMostMove = 1;
    safeStrCpy(moveList[0], "", sizeof(moveList[0])/sizeof(moveList[0][0]));
    safeStrCpy(parseList[0], "", sizeof(parseList[0])/sizeof(parseList[0][0]));
    CopyBoard(boards[1], initial_position);
    DisplayMessage("", _("Black to play"));
  } else {
    currentMove = forwardMostMove = backwardMostMove = 0;
    DisplayMessage("", _("White to play"));
  }
  initialRulePlies = FENrulePlies; /* [HGM] copy FEN attributes as well */
  if(first.pr != NoProc) { // [HGM] in tourney-mode a position can be loaded before the chess engine is installed
    SendToProgram("force\n", &first);
    SendBoard(&first, forwardMostMove);
  }
  if (appData.debugMode) {
    int i, j;
    for(i=0;i<2;i++){for(j=0;j<6;j++)fprintf(debugFP, " %d", boards[i][CASTLING][j]);fprintf(debugFP,"\n");}
    for(j=0;j<6;j++)fprintf(debugFP, " %d", initialRights[j]);fprintf(debugFP,"\n");
    fprintf(debugFP, "Load Position\n");
  }

  if (positionNumber > 1) {
    snprintf(line, MSG_SIZ, "%s %d", title, positionNumber);
    DisplayTitle(line);
  } else {
    DisplayTitle(title);
  }
  gameMode = EditGame;
  ModeHighlight();
  ResetClocks();
  timeRemaining[0][1] = whiteTimeRemaining;
  timeRemaining[1][1] = blackTimeRemaining;
  DrawPosition(FALSE, boards[currentMove]);

  return TRUE;
}


void CopyPlayerNameIntoFileName (char **dest, char *src)
{
  while (*src != NULLCHAR && *src != ',') {
    if (*src == ' ') {
      *(*dest)++ = '_';
      src++;
    } else {
      *(*dest)++ = *src++;
    }
  }
}

char * DefaultFileName (char *ext)
{
  static char def[MSG_SIZ];
  char *p;

  if (gameInfo.white != NULL && gameInfo.white[0] != '-') {
    p = def;
    CopyPlayerNameIntoFileName(&p, gameInfo.white);
    *p++ = '-';
    CopyPlayerNameIntoFileName(&p, gameInfo.black);
    *p++ = '.';
    safeStrCpy(p, ext, MSG_SIZ-2-strlen(gameInfo.white)-strlen(gameInfo.black));
  } else {
    def[0] = NULLCHAR;
  }
  return def;
}

/* Save the current game to the given file */
int SaveGameToFile (char *filename, int append)
{
  FILE *f;
  char buf[MSG_SIZ];
  int result, i, t,tot=0;

  if (strcmp(filename, "-") == 0) {
    return SaveGame(stdout, 0, NULL);
  } else {
    for(i=0; i<10; i++) { // upto 10 tries
      f = fopen(filename, append ? "a" : "w");
      if(f && i) fprintf(f, "[Delay \"%d retries, %d msec\"]\n",i,tot);
      if(f || errno != 13) break;
      DoSleep(t = 5 + random()%11); // wait 5-15 msec
      tot += t;
    }
    if (f == NULL) {
      snprintf(buf, sizeof(buf), _("Can't open \"%s\""), filename);
      DisplayError(buf, errno);
      return FALSE;
    } else {
      safeStrCpy(buf, lastMsg, MSG_SIZ);
      DisplayMessage(_("Waiting for access to save file"), "");
      flock(fileno(f), LOCK_EX); // [HGM] lock: lock file while we are writing
      DisplayMessage(_("Saving game"), "");
      if(lseek(fileno(f), 0, SEEK_END) == -1) DisplayError(_("Bad Seek"), errno);     // better safe than sorry...
      result = SaveGame(f, 0, NULL);
      DisplayMessage(buf, "");
      return result;
    }
  }
}

char * SavePart (char *str)
{
  static char buf[MSG_SIZ];
  char *p;

  p = strchr(str, ' ');
  if (p == NULL) return str;
  strncpy(buf, str, p - str);
  buf[p - str] = NULLCHAR;
  return buf;
}

#define PGN_MAX_LINE 75

#define PGN_SIDE_WHITE  0
#define PGN_SIDE_BLACK  1

static int FindFirstMoveOutOfBook (int side)
{
  int result = -1;

  if( backwardMostMove == 0 && ! startedFromSetupPosition) {
    int index = backwardMostMove;
    int has_book_hit = 0;

    if( (index % 2) != side ) {
      index++;
    }

    while( index < forwardMostMove ) {
      /* Check to see if engine is in book */
      int depth = pvInfoList[index].depth;
      int score = pvInfoList[index].score;
      int in_book = 0;

      if( depth <= 2 ) {
        in_book = 1;
      }
      else if( score == 0 && depth == 63 ) {
        in_book = 1; /* Zappa */
      }
      else if( score == 2 && depth == 99 ) {
        in_book = 1; /* Abrok */
      }

      has_book_hit += in_book;

      if( ! in_book ) {
        result = index;

        break;
      }

      index += 2;
    }
  }

  return result;
}

void GetOutOfBookInfo (char * buf)
{
  int oob[2];
  int i;
  int offset = backwardMostMove & (~1L); /* output move numbers start at 1 */

  oob[0] = FindFirstMoveOutOfBook( PGN_SIDE_WHITE );
  oob[1] = FindFirstMoveOutOfBook( PGN_SIDE_BLACK );

  *buf = '\0';

  if( oob[0] >= 0 || oob[1] >= 0 ) {
    for( i=0; i<2; i++ ) {
      int idx = oob[i];

      if( idx >= 0 ) {
        if( i > 0 && oob[0] >= 0 ) {
          strcat( buf, "   " );
        }

        sprintf( buf+strlen(buf), "%d%s. ", (idx - offset)/2 + 1, idx & 1 ? ".." : "" );
        sprintf( buf+strlen(buf), "%s%.2f",
            pvInfoList[idx].score >= 0 ? "+" : "",
            pvInfoList[idx].score / 100.0 );
      }
    }
  }
}

/* Save game in PGN style */
static void SaveGamePGN2 (FILE *f)
{
  int i, offset, linelen, newblock;
  //    char *movetext;
  char numtext[32];
  int movelen, numlen, blank;
  char move_buffer[100]; /* [AS] Buffer for move+PV info */

  offset = backwardMostMove & (~1L); /* output move numbers start at 1 */

  PrintPGNTags(f, &gameInfo);

  if(appData.numberTag && matchMode) fprintf(f, "[Number \"%d\"]\n", nextGame+1); // [HGM] number tag

  if (backwardMostMove > 0 || startedFromSetupPosition) {
    char *fen = PositionToFEN(backwardMostMove, NULL, 1);
    fprintf(f, "[FEN \"%s\"]\n[SetUp \"1\"]\n", fen);
    fprintf(f, "\n{--------------\n");
    PrintPosition(f, backwardMostMove);
    fprintf(f, "--------------}\n");
    free(fen);
  }
  else {
    /* [AS] Out of book annotation */
    if( appData.saveOutOfBookInfo ) {
      char buf[64];

      GetOutOfBookInfo( buf );

      if( buf[0] != '\0' ) {
        fprintf( f, "[%s \"%s\"]\n", PGN_OUT_OF_BOOK, "Winboard");
      }
    }

    fprintf(f, "\n");
  }

  i = backwardMostMove;
  linelen = 0;
  newblock = TRUE;

  while (i < forwardMostMove) {
    /* Print comments preceding this move */
    if (commentList[i] != NULL) {
      if (linelen > 0) fprintf(f, "\n");
      fprintf(f, "%s", commentList[i]);
      linelen = 0;
      newblock = TRUE;
    }

    /* Format move number */
    if ((i % 2) == 0)
      snprintf(numtext, sizeof(numtext)/sizeof(numtext[0]),"%d.", (i - offset)/2 + 1);
    else
      if (newblock)
        snprintf(numtext, sizeof(numtext)/sizeof(numtext[0]), "%d...", (i - offset)/2 + 1);
      else
        numtext[0] = NULLCHAR;

    numlen = strlen(numtext);
    newblock = FALSE;

    /* Print move number */
    blank = linelen > 0 && numlen > 0;
    if (linelen + (blank ? 1 : 0) + numlen > PGN_MAX_LINE) {
      fprintf(f, "\n");
      linelen = 0;
      blank = 0;
    }
    if (blank) {
      fprintf(f, " ");
      linelen++;
    }
    fprintf(f, "%s", numtext);
    linelen += numlen;

    /* Get move */
    safeStrCpy(move_buffer, SavePart(parseList[i]), sizeof(move_buffer)/sizeof(move_buffer[0])); // [HGM] pgn: print move via buffer, so it can be edited
    movelen = strlen(move_buffer); /* [HGM] pgn: line-break point before move */

    /* Print move */
    blank = linelen > 0 && movelen > 0;
    if (linelen + (blank ? 1 : 0) + movelen > PGN_MAX_LINE) {
      fprintf(f, "\n");
      linelen = 0;
      blank = 0;
    }
    if (blank) {
      fprintf(f, " ");
      linelen++;
    }
    fprintf(f, "%s", move_buffer);
    linelen += movelen;

    /* [AS] Add PV info if present */
    if( i >= 0 && appData.saveExtendedInfoInPGN && pvInfoList[i].depth > 0 ) {
      /* [HGM] add time */
      char buf[MSG_SIZ]; int seconds;

      seconds = (pvInfoList[i].time+5)/10; // deci-seconds, rounded to nearest

      if( seconds <= 0)
        buf[0] = 0;
      else
        if( seconds < 30 )
          snprintf(buf, MSG_SIZ, " %3.1f%c", seconds/10., 0);
        else
        {
          seconds = (seconds + 4)/10; // round to full seconds
          if( seconds < 60 )
            snprintf(buf, MSG_SIZ, " %d%c", seconds, 0);
          else
            snprintf(buf, MSG_SIZ, " %d:%02d%c", seconds/60, seconds%60, 0);
        }

      if(appData.cumulativeTimePGN) {
        snprintf(buf, MSG_SIZ, " %+ld", timeRemaining[i & 1][i+1]/1000);
      }

      snprintf( move_buffer, sizeof(move_buffer)/sizeof(move_buffer[0]),"{%s%.2f/%d%s}",
          pvInfoList[i].score >= 0 ? "+" : "",
          pvInfoList[i].score / 100.0,
          pvInfoList[i].depth,
          buf );

      movelen = strlen(move_buffer); /* [HGM] pgn: line-break point after move */

      /* Print score/depth */
      blank = linelen > 0 && movelen > 0;
      if (linelen + (blank ? 1 : 0) + movelen > PGN_MAX_LINE) {
        fprintf(f, "\n");
        linelen = 0;
        blank = 0;
      }
      if (blank) {
        fprintf(f, " ");
        linelen++;
      }
      fprintf(f, "%s", move_buffer);
      linelen += movelen;
    }

    i++;
  }

  /* Start a new line */
  if (linelen > 0) fprintf(f, "\n");

  /* Print comments after last move */
  if (commentList[i] != NULL) {
    fprintf(f, "%s\n", commentList[i]);
  }

  /* Print result */
  if (gameInfo.resultDetails != NULL &&
      gameInfo.resultDetails[0] != NULLCHAR) {
    char buf[MSG_SIZ], *p = gameInfo.resultDetails;
    if(gameInfo.result == GameUnfinished && appData.clockMode &&
        (gameMode == MachinePlaysWhite || gameMode == MachinePlaysBlack || gameMode == TwoMachinesPlay)) // [HGM] adjourn: save clock settings
      snprintf(buf, MSG_SIZ, "%s (Clocks: %ld, %ld)", p, whiteTimeRemaining/1000, blackTimeRemaining/1000), p = buf;
    fprintf(f, "{%s} %s\n\n", p, PGNResult(gameInfo.result));
  } else {
    fprintf(f, "%s\n\n", PGNResult(gameInfo.result));
  }
}

/* Save game in PGN style and close the file */
int SaveGamePGN (FILE *f)
{
  SaveGamePGN2(f);
  fclose(f);
  lastSavedGame = GameCheckSum(); // [HGM] save: remember ID of last saved game to prevent double saving
  return TRUE;
}

/* Save game in old style and close the file */
int SaveGameOldStyle (FILE *f)
{
  int i, offset;
  time_t tm;

  tm = time((time_t *) NULL);

  fprintf(f, "# %s game file -- %s", programName, ctime(&tm));
  PrintOpponents(f);

  if (backwardMostMove > 0 || startedFromSetupPosition) {
    fprintf(f, "\n[--------------\n");
    PrintPosition(f, backwardMostMove);
    fprintf(f, "--------------]\n");
  } else {
    fprintf(f, "\n");
  }

  i = backwardMostMove;
  offset = backwardMostMove & (~1L); /* output move numbers start at 1 */

  while (i < forwardMostMove) {
    if (commentList[i] != NULL) {
      fprintf(f, "[%s]\n", commentList[i]);
    }

    if ((i % 2) == 1) {
      fprintf(f, "%d. ...  %s\n", (i - offset)/2 + 1, parseList[i]);
      i++;
    } else {
      fprintf(f, "%d. %s  ", (i - offset)/2 + 1, parseList[i]);
      i++;
      if (commentList[i] != NULL) {
        fprintf(f, "\n");
        continue;
      }
      if (i >= forwardMostMove) {
        fprintf(f, "\n");
        break;
      }
      fprintf(f, "%s\n", parseList[i]);
      i++;
    }
  }

  if (commentList[i] != NULL) {
    fprintf(f, "[%s]\n", commentList[i]);
  }

  /* This isn't really the old style, but it's close enough */
  if (gameInfo.resultDetails != NULL &&
      gameInfo.resultDetails[0] != NULLCHAR) {
    fprintf(f, "%s (%s)\n\n", PGNResult(gameInfo.result),
        gameInfo.resultDetails);
  } else {
    fprintf(f, "%s\n\n", PGNResult(gameInfo.result));
  }

  fclose(f);
  return TRUE;
}

/* Save the current game to open file f and close the file */
int SaveGame (FILE *f, int dummy, char *dummy2)
{
  if (gameMode == EditPosition) EditPositionDone(TRUE);
  lastSavedGame = GameCheckSum(); // [HGM] save: remember ID of last saved game to prevent double saving
  if (appData.oldSaveStyle)
    return SaveGameOldStyle(f);
  else
    return SaveGamePGN(f);
}

/* Save the current position to the given file */
int SavePositionToFile (char *filename)
{
  FILE *f;
  char buf[MSG_SIZ];

  if (strcmp(filename, "-") == 0) {
    return SavePosition(stdout, 0, NULL);
  } else {
    f = fopen(filename, "a");
    if (f == NULL) {
      snprintf(buf, sizeof(buf), _("Can't open \"%s\""), filename);
      DisplayError(buf, errno);
      return FALSE;
    } else {
      safeStrCpy(buf, lastMsg, MSG_SIZ);
      DisplayMessage(_("Waiting for access to save file"), "");
      flock(fileno(f), LOCK_EX); // [HGM] lock
      DisplayMessage(_("Saving position"), "");
      lseek(fileno(f), 0, SEEK_END);     // better safe than sorry...
      SavePosition(f, 0, NULL);
      DisplayMessage(buf, "");
      return TRUE;
    }
  }
}

/* Save the current position to the given open file and close the file */
int SavePosition (FILE *f, int dummy, char *dummy2)
{
  time_t tm;
  char *fen;

  if (gameMode == EditPosition) EditPositionDone(TRUE);
  if (appData.oldSaveStyle) {
    tm = time((time_t *) NULL);

    fprintf(f, "# %s position file -- %s", programName, ctime(&tm));
    PrintOpponents(f);
    fprintf(f, "[--------------\n");
    PrintPosition(f, currentMove);
    fprintf(f, "--------------]\n");
  } else {
    fen = PositionToFEN(currentMove, NULL, 1);
    fprintf(f, "%s\n", fen);
    free(fen);
  }
  fclose(f);
  return TRUE;
}

void ReloadCmailMsgEvent (int unregister)
{
#if !WIN32
  static char *inFilename = NULL;
  static char *outFilename;
  int i;
  struct stat inbuf, outbuf;
  int status;

  /* Any registered moves are unregistered if unregister is set, */
  /* i.e. invoked by the signal handler */
  if (unregister) {
    for (i = 0; i < CMAIL_MAX_GAMES; i ++) {
      cmailMoveRegistered[i] = FALSE;
      if (cmailCommentList[i] != NULL) {
        free(cmailCommentList[i]);
        cmailCommentList[i] = NULL;
      }
    }
    nCmailMovesRegistered = 0;
  }

  for (i = 0; i < CMAIL_MAX_GAMES; i ++) {
    cmailResult[i] = CMAIL_NOT_RESULT;
  }
  nCmailResults = 0;

  if (inFilename == NULL) {
    /* Because the filenames are static they only get malloced once  */
    /* and they never get freed                                      */
    inFilename = (char *) malloc(strlen(appData.cmailGameName) + 9);
    sprintf(inFilename, "%s.game.in", appData.cmailGameName);

    outFilename = (char *) malloc(strlen(appData.cmailGameName) + 5);
    sprintf(outFilename, "%s.out", appData.cmailGameName);
  }

  status = stat(outFilename, &outbuf);
  if (status < 0) {
    cmailMailedMove = FALSE;
  } else {
    status = stat(inFilename, &inbuf);
    cmailMailedMove = (inbuf.st_mtime < outbuf.st_mtime);
  }

  /* LoadGameFromFile(CMAIL_MAX_GAMES) with cmailMsgLoaded == TRUE
     counts the games, notes how each one terminated, etc.

     It would be nice to remove this kludge and instead gather all
     the information while building the game list.  (And to keep it
     in the game list nodes instead of having a bunch of fixed-size
     parallel arrays.)  Note this will require getting each game's
     termination from the PGN tags, as the game list builder does
     not process the game moves.  --mann
     */
  cmailMsgLoaded = TRUE;
  LoadGameFromFile(inFilename, CMAIL_MAX_GAMES, "", FALSE);

  /* Load first game in the file or popup game menu */
  LoadGameFromFile(inFilename, 0, appData.cmailGameName, TRUE);

#endif /* !WIN32 */
  return;
}

int RegisterMove ()
{
  FILE *f;
  char string[MSG_SIZ];

  if (   cmailMailedMove
      || (cmailResult[lastLoadGameNumber - 1] == CMAIL_OLD_RESULT)) {
    return TRUE;		/* Allow free viewing  */
  }

  /* Unregister move to ensure that we don't leave RegisterMove        */
  /* with the move registered when the conditions for registering no   */
  /* longer hold                                                       */
  if (cmailMoveRegistered[lastLoadGameNumber - 1]) {
    cmailMoveRegistered[lastLoadGameNumber - 1] = FALSE;
    nCmailMovesRegistered --;

    if (cmailCommentList[lastLoadGameNumber - 1] != NULL)
    {
      free(cmailCommentList[lastLoadGameNumber - 1]);
      cmailCommentList[lastLoadGameNumber - 1] = NULL;
    }
  }

  if (cmailOldMove == -1) {
    DisplayError(_("You have edited the game history.\nUse Reload Same Game and make your move again."), 0);
    return FALSE;
  }

  if (currentMove > cmailOldMove + 1) {
    DisplayError(_("You have entered too many moves.\nBack up to the correct position and try again."), 0);
    return FALSE;
  }

  if (currentMove < cmailOldMove) {
    DisplayError(_("Displayed position is not current.\nStep forward to the correct position and try again."), 0);
    return FALSE;
  }

  if (forwardMostMove > currentMove) {
    /* Silently truncate extra moves */
    TruncateGame();
  }

  if (   (currentMove == cmailOldMove + 1)
      || (   (currentMove == cmailOldMove)
        && (   (cmailMoveType[lastLoadGameNumber - 1] == CMAIL_ACCEPT)
          || (cmailMoveType[lastLoadGameNumber - 1] == CMAIL_RESIGN)))) {
    if (gameInfo.result != GameUnfinished) {
      cmailResult[lastLoadGameNumber - 1] = CMAIL_NEW_RESULT;
    }

    if (commentList[currentMove] != NULL) {
      cmailCommentList[lastLoadGameNumber - 1]
        = StrSave(commentList[currentMove]);
    }
    safeStrCpy(cmailMove[lastLoadGameNumber - 1], moveList[currentMove - 1], sizeof(cmailMove[lastLoadGameNumber - 1])/sizeof(cmailMove[lastLoadGameNumber - 1][0]));

    if (appData.debugMode)
      fprintf(debugFP, "Saving %s for game %d\n",
          cmailMove[lastLoadGameNumber - 1], lastLoadGameNumber);

    snprintf(string, MSG_SIZ, "%s.game.out.%d", appData.cmailGameName, lastLoadGameNumber);

    f = fopen(string, "w");
    if (appData.oldSaveStyle) {
      SaveGameOldStyle(f); /* also closes the file */

      snprintf(string, MSG_SIZ, "%s.pos.out", appData.cmailGameName);
      f = fopen(string, "w");
      SavePosition(f, 0, NULL); /* also closes the file */
    } else {
      fprintf(f, "{--------------\n");
      PrintPosition(f, currentMove);
      fprintf(f, "--------------}\n\n");

      SaveGame(f, 0, NULL); /* also closes the file*/
    }

    cmailMoveRegistered[lastLoadGameNumber - 1] = TRUE;
    nCmailMovesRegistered ++;
  } else if (nCmailGames == 1) {
    DisplayError(_("You have not made a move yet"), 0);
    return FALSE;
  }

  return TRUE;
}

void MailMoveEvent ()
{
#if !WIN32
  static char *partCommandString = "cmail -xv%s -remail -game %s 2>&1";
  FILE *commandOutput;
  char buffer[MSG_SIZ], msg[MSG_SIZ], string[MSG_SIZ];
  int nBytes = 0;		/*  Suppress warnings on uninitialized variables    */
  int nBuffers;
  int i;
  int archived;
  char *arcDir;

  if (! cmailMsgLoaded) {
    DisplayError(_("The cmail message is not loaded.\nUse Reload CMail Message and make your move again."), 0);
    return;
  }

  if (nCmailGames == nCmailResults) {
    DisplayError(_("No unfinished games"), 0);
    return;
  }

#if CMAIL_PROHIBIT_REMAIL
  if (cmailMailedMove) {
    snprintf(msg, MSG_SIZ, _("You have already mailed a move.\nWait until a move arrives from your opponent.\nTo resend the same move, type\n\"cmail -remail -game %s\"\non the command line."), appData.cmailGameName);
    DisplayError(msg, 0);
    return;
  }
#endif

  if (! (cmailMailedMove || RegisterMove())) return;

  if (   cmailMailedMove
      || (nCmailMovesRegistered + nCmailResults == nCmailGames)) {
    snprintf(string, MSG_SIZ, partCommandString,
        appData.debugMode ? " -v" : "", appData.cmailGameName);
    commandOutput = popen(string, "r");

    if (commandOutput == NULL) {
      DisplayError(_("Failed to invoke cmail"), 0);
    } else {
      for (nBuffers = 0; (! feof(commandOutput)); nBuffers ++) {
        nBytes = fread(buffer, 1, MSG_SIZ - 1, commandOutput);
      }
      if (nBuffers > 1) {
        (void) memcpy(msg, buffer + nBytes, MSG_SIZ - nBytes - 1);
        (void) memcpy(msg + MSG_SIZ - nBytes - 1, buffer, nBytes);
        nBytes = MSG_SIZ - 1;
      } else {
        (void) memcpy(msg, buffer, nBytes);
      }
      *(msg + nBytes) = '\0'; /* \0 for end-of-string*/

      if(StrStr(msg, "Mailed cmail message to ") != NULL) {
        cmailMailedMove = TRUE; /* Prevent >1 moves    */

        archived = TRUE;
        for (i = 0; i < nCmailGames; i ++) {
          if (cmailResult[i] == CMAIL_NOT_RESULT) {
            archived = FALSE;
          }
        }
        if (   archived
            && (   (arcDir = (char *) getenv("CMAIL_ARCDIR"))
              != NULL)) {
          snprintf(buffer, MSG_SIZ, "%s/%s.%s.archive",
              arcDir,
              appData.cmailGameName,
              gameInfo.date);
          LoadGameFromFile(buffer, 1, buffer, FALSE);
          cmailMsgLoaded = FALSE;
        }
      }

      DisplayInformation(msg);
      pclose(commandOutput);
    }
  } else {
    if ((*cmailMsg) != '\0') {
      DisplayInformation(cmailMsg);
    }
  }

  return;
#endif /* !WIN32 */
}

char * CmailMsg ()
{
#if WIN32
  return NULL;
#else
  int  prependComma = 0;
  char number[5];
  char string[MSG_SIZ];	/* Space for game-list */
  int  i;

  if (!cmailMsgLoaded) return "";

  if (cmailMailedMove) {
    snprintf(cmailMsg, MSG_SIZ, _("Waiting for reply from opponent\n"));
  } else {
    /* Create a list of games left */
    snprintf(string, MSG_SIZ, "[");
    for (i = 0; i < nCmailGames; i ++) {
      if (! (   cmailMoveRegistered[i]
            || (cmailResult[i] == CMAIL_OLD_RESULT))) {
        if (prependComma) {
          snprintf(number, sizeof(number)/sizeof(number[0]), ",%d", i + 1);
        } else {
          snprintf(number, sizeof(number)/sizeof(number[0]), "%d", i + 1);
          prependComma = 1;
        }

        strcat(string, number);
      }
    }
    strcat(string, "]");

    if (nCmailMovesRegistered + nCmailResults == 0) {
      switch (nCmailGames) {
        case 1:
          snprintf(cmailMsg, MSG_SIZ, _("Still need to make move for game\n"));
          break;

        case 2:
          snprintf(cmailMsg, MSG_SIZ, _("Still need to make moves for both games\n"));
          break;

        default:
          snprintf(cmailMsg, MSG_SIZ, _("Still need to make moves for all %d games\n"),
              nCmailGames);
          break;
      }
    } else {
      switch (nCmailGames - nCmailMovesRegistered - nCmailResults) {
        case 1:
          snprintf(cmailMsg, MSG_SIZ, _("Still need to make a move for game %s\n"),
              string);
          break;

        case 0:
          if (nCmailResults == nCmailGames) {
            snprintf(cmailMsg, MSG_SIZ, _("No unfinished games\n"));
          } else {
            snprintf(cmailMsg, MSG_SIZ, _("Ready to send mail\n"));
          }
          break;

        default:
          snprintf(cmailMsg, MSG_SIZ, _("Still need to make moves for games %s\n"),
              string);
      }
    }
  }
  return cmailMsg;
#endif /* WIN32 */
}

void ResetGameEvent ()
{
  if (gameMode == Training)
    SetTrainingModeOff();

  Reset(TRUE, TRUE);
  cmailMsgLoaded = FALSE;
  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("refresh\n");
  }
}

void ExitEvent (int status)
{
  exiting++;
  if (exiting > 2) {
    /* Give up on clean exit */
    exit(status);
  }
  if (exiting > 1) {
    /* Keep trying for clean exit */
    return;
  }

  if (appData.icsActive) printf("\n"); // [HGM] end on new line after closing XBoard
  if (appData.icsActive && appData.colorize) Colorize(ColorNone, FALSE);

  if (telnetISR != NULL) {
    RemoveInputSource(telnetISR);
  }
  if (icsPR != NoProc) {
    DestroyChildProcess(icsPR, TRUE);
  }

  /* [HGM] crash: leave writing PGN and position entirely to GameEnds() */
  GameEnds(gameInfo.result, gameInfo.resultDetails==NULL ? "xboard exit" : gameInfo.resultDetails, GE_PLAYER);

  /* [HGM] crash: the above GameEnds() is a dud if another one was running */
  /* make sure this other one finishes before killing it!                  */
  if(endingGame) { int count = 0;
    if(appData.debugMode) fprintf(debugFP, "ExitEvent() during GameEnds(), wait\n");
    while(endingGame && count++ < 10) DoSleep(1);
    if(appData.debugMode && endingGame) fprintf(debugFP, "GameEnds() seems stuck, proceed exiting\n");
  }

  /* Kill off chess programs */
  if (first.pr != NoProc) {
    ExitAnalyzeMode();

    DoSleep( appData.delayBeforeQuit );
    SendToProgram("quit\n", &first);
    DestroyChildProcess(first.pr, 4 + first.useSigterm /* [AS] first.useSigterm */ );
  }
  if (second.pr != NoProc) {
    DoSleep( appData.delayBeforeQuit );
    SendToProgram("quit\n", &second);
    DestroyChildProcess(second.pr, 4 + second.useSigterm /* [AS] second.useSigterm */ );
  }
  if (first.isr != NULL) {
    RemoveInputSource(first.isr);
  }
  if (second.isr != NULL) {
    RemoveInputSource(second.isr);
  }

  if (pairing.pr != NoProc) SendToProgram("quit\n", &pairing);
  if (pairing.isr != NULL) RemoveInputSource(pairing.isr);

  ShutDownFrontEnd();
  exit(status);
}

void PauseEngine (ChessProgramState *cps)
{
  SendToProgram("pause\n", cps);
  cps->pause = 2;
}

void UnPauseEngine (ChessProgramState *cps)
{
  SendToProgram("resume\n", cps);
  cps->pause = 1;
}

void PauseEvent ()
{
  if (appData.debugMode)
    fprintf(debugFP, "PauseEvent(): pausing %d\n", pausing);
  if (pausing) {
    pausing = FALSE;
    ModeHighlight();
    if(stalledEngine) { // [HGM] pause: resume game by releasing withheld move
      StartClocks();
      if(gameMode == TwoMachinesPlay) { // we might have to make the opponent resume pondering
        if(stalledEngine->other->pause == 2) UnPauseEngine(stalledEngine->other);
        else if(appData.ponderNextMove) SendToProgram("hard\n", stalledEngine->other);
      }
      if(appData.ponderNextMove) SendToProgram("hard\n", stalledEngine);
      HandleMachineMove(stashedInputMove, stalledEngine);
      stalledEngine = NULL;
      return;
    }
    if (gameMode == MachinePlaysWhite ||
        gameMode == TwoMachinesPlay   ||
        gameMode == MachinePlaysBlack ||
        gameMode == AnalyzeMode) { // the thinking engine must have used pause mode, or it would have been stalledEngine
      if(first.pause)  UnPauseEngine(&first);
      else if(gameMode == AnalyzeMode) SendToProgram("analyze\n", &first);
      else if(appData.ponderNextMove) SendToProgram("hard\n", &first);
      if(second.pause) UnPauseEngine(&second);
      else if(gameMode == TwoMachinesPlay && appData.ponderNextMove) SendToProgram("hard\n", &second);
      StartClocks();
    } else {
      DisplayBothClocks();
    }
    if (gameMode == PlayFromGameFile) {
      //if (appData.timeDelay >= 0)
      //   AutoPlayGameLoop();
    } else if (gameMode == IcsExamining && pauseExamInvalid) {
      Reset(FALSE, TRUE);
      SendToICS(ics_prefix);
      SendToICS("refresh\n");
    } else if (currentMove < forwardMostMove && gameMode != AnalyzeMode) {
      ForwardInner(forwardMostMove);
    }
    pauseExamInvalid = FALSE;
  } else {
    switch (gameMode) {
      default:
        return;
      case IcsExamining:
        pauseExamForwardMostMove = forwardMostMove;
        pauseExamInvalid = FALSE;
        /* fall through */
      case IcsObserving:
      case IcsPlayingWhite:
      case IcsPlayingBlack:
        pausing = TRUE;
        ModeHighlight();
        return;
      case PlayFromGameFile:
        (void) StopLoadGameTimer();
        pausing = TRUE;
        ModeHighlight();
        break;
      case BeginningOfGame:
        if (appData.icsActive) return;
        /* else fall through */
      case MachinePlaysWhite:
      case MachinePlaysBlack:
      case TwoMachinesPlay:
        if (forwardMostMove == 0)
          return;		/* don't pause if no one has moved */
        if(gameMode == TwoMachinesPlay) { // [HGM] pause: stop clocks if engine can be paused immediately
          ChessProgramState *onMove = (WhiteOnMove(forwardMostMove) == (first.twoMachinesColor[0] == 'w') ? &first : &second);
          if(onMove->pause) {           // thinking engine can be paused
            PauseEngine(onMove);      // do it
            if(onMove->other->pause)  // pondering opponent can always be paused immediately
              PauseEngine(onMove->other);
            else
              SendToProgram("easy\n", onMove->other);
            StopClocks();
          } else if(appData.ponderNextMove) SendToProgram("easy\n", onMove); // pre-emptively bring out of ponder
        } else if(gameMode == (WhiteOnMove(forwardMostMove) ? MachinePlaysWhite : MachinePlaysBlack)) { // engine on move
          if(first.pause) {
            PauseEngine(&first);
            StopClocks();
          } else if(appData.ponderNextMove) SendToProgram("easy\n", &first); // pre-emptively bring out of ponder
        } else { // human on move, pause pondering by either method
          if(first.pause)
            PauseEngine(&first);
          else if(appData.ponderNextMove)
            SendToProgram("easy\n", &first);
          StopClocks();
        }
        // if no immediate pausing is possible, wait for engine to move, and stop clocks then
      case AnalyzeMode:
        pausing = TRUE;
        SendToProgram("stop\n", &first);
        ModeHighlight();
        break;
    }
  }
}

void EditCommentEvent ()
{
  char title[MSG_SIZ];

  if (currentMove < 1 || parseList[currentMove - 1][0] == NULLCHAR) {
    safeStrCpy(title, _("Edit comment"), sizeof(title)/sizeof(title[0]));
  } else {
    snprintf(title, MSG_SIZ, _("Edit comment on %d.%s%s"), (currentMove - 1) / 2 + 1,
        WhiteOnMove(currentMove - 1) ? " " : ".. ",
        parseList[currentMove - 1]);
  }

  EditCommentPopUp(currentMove, title, commentList[currentMove]);
}


void EditTagsEvent ()
{
  char *tags = PGNTags(&gameInfo);
  bookUp = FALSE;
  EditTagsPopUp(tags, NULL);
  free(tags);
}

void ToggleSecond ()
{
  if(second.analyzing) {
    SendToProgram("exit\n", &second);
    second.analyzing = FALSE;
  } else {
    if (second.pr == NoProc) StartChessProgram(&second);
    InitChessProgram(&second, FALSE);
    FeedMovesToProgram(&second, currentMove);

    SendToProgram("analyze\n", &second);
    second.analyzing = TRUE;
  }
}

/* Toggle ShowThinking */
void ToggleShowThinking()
{
  appData.showThinking = !appData.showThinking;
  ShowThinkingEvent();
}

int AnalyzeModeEvent ()
{
  char buf[MSG_SIZ];

  if (!first.analysisSupport) {
    snprintf(buf, sizeof(buf), _("%s does not support analysis"), first.tidy);
    DisplayError(buf, 0);
    return 0;
  }
  /* [DM] icsEngineAnalyze [HGM] This is horrible code; reverse the gameMode and isEngineAnalyze tests! */
  if (appData.icsActive) {
    if (gameMode != IcsObserving) {
      snprintf(buf, MSG_SIZ, _("You are not observing a game"));
      DisplayError(buf, 0);
      /* secure check */
      if (appData.icsEngineAnalyze) {
        if (appData.debugMode)
          fprintf(debugFP, "Found unexpected active ICS engine analyze \n");
        ExitAnalyzeMode();
        ModeHighlight();
      }
      return 0;
    }
    /* if enable, user wants to disable icsEngineAnalyze */
    if (appData.icsEngineAnalyze) {
      ExitAnalyzeMode();
      ModeHighlight();
      return 0;
    }
    appData.icsEngineAnalyze = TRUE;
    if (appData.debugMode)
      fprintf(debugFP, "ICS engine analyze starting... \n");
  }

  if (gameMode == AnalyzeMode) { ToggleSecond(); return 0; }
  if (appData.noChessProgram || gameMode == AnalyzeMode)
    return 0;

  if (gameMode != AnalyzeFile) {
    if (!appData.icsEngineAnalyze) {
      EditGameEvent();
      if (gameMode != EditGame) return 0;
    }
    if (!appData.showThinking) ToggleShowThinking();
    ResurrectChessProgram();
    SendToProgram("analyze\n", &first);
    first.analyzing = TRUE;
    first.maybeThinking = TRUE;
    // first.maybeThinking = FALSE; // avoid killing GNU Chess
    //EngineOutputPopUp();
  }
  if (!appData.icsEngineAnalyze) {
    gameMode = AnalyzeMode;
    ClearEngineOutputPane(0); // [TK] exclude: to print exclusion/multipv header
  }
  pausing = FALSE;
  ModeHighlight();
  SetGameInfo();

  StartAnalysisClock();
  GetTimeMark(&lastNodeCountTime);
  lastNodeCount = 0;
  return 1;
}

void AnalyzeFileEvent ()
{
  if (appData.noChessProgram || gameMode == AnalyzeFile)
    return;

  if (!first.analysisSupport) {
    char buf[MSG_SIZ];
    snprintf(buf, sizeof(buf), _("%s does not support analysis"), first.tidy);
    DisplayError(buf, 0);
    return;
  }

  if (gameMode != AnalyzeMode) {
    keepInfo = 1; // mere annotating should not alter PGN tags
    EditGameEvent();
    keepInfo = 0;
    if (gameMode != EditGame) return;
    if (!appData.showThinking) ToggleShowThinking();
    ResurrectChessProgram();
    SendToProgram("analyze\n", &first);
    first.analyzing = TRUE;
    first.maybeThinking = TRUE;
    // first.maybeThinking = FALSE; // avoid killing GNU Chess
    //EngineOutputPopUp();
  }
  gameMode = AnalyzeFile;
  pausing = FALSE;
  ModeHighlight();

  StartAnalysisClock();
  GetTimeMark(&lastNodeCountTime);
  lastNodeCount = 0;
  if(appData.timeDelay > 0) StartLoadGameTimer((long)(1000.0f * appData.timeDelay));
  AnalysisPeriodicEvent(1);
}

void MachineWhiteEvent ()
{
  char buf[MSG_SIZ];
  char *bookHit = NULL;

  if (appData.noChessProgram || (gameMode == MachinePlaysWhite))
    return;


  if (gameMode == PlayFromGameFile ||
      gameMode == TwoMachinesPlay  ||
      gameMode == Training         ||
      gameMode == AnalyzeMode      ||
      gameMode == EndOfGame)
    EditGameEvent();

  if (gameMode == EditPosition)
    EditPositionDone(TRUE);

  if (!WhiteOnMove(currentMove)) {
    DisplayError(_("It is not White's turn"), 0);
    return;
  }

  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile)
    ExitAnalyzeMode();

  if (gameMode == EditGame || gameMode == AnalyzeMode ||
      gameMode == AnalyzeFile)
    TruncateGame();

  ResurrectChessProgram();	/* in case it isn't running */
  if(gameMode == BeginningOfGame) { /* [HGM] time odds: to get right odds in human mode */
    gameMode = MachinePlaysWhite;
    ResetClocks();
  } else
    gameMode = MachinePlaysWhite;
  pausing = FALSE;
  ModeHighlight();
  SetGameInfo();
  snprintf(buf, MSG_SIZ, "%s %s %s", gameInfo.white, _("vs."), gameInfo.black);
  DisplayTitle(buf);
  if (first.sendName) {
    snprintf(buf, MSG_SIZ, "name %s\n", gameInfo.black);
    SendToProgram(buf, &first);
  }
  if (first.sendTime) {
    if (first.useColors) {
      SendToProgram("black\n", &first); /*gnu kludge*/
    }
    SendTimeRemaining(&first, TRUE);
  }
  if (first.useColors) {
    SendToProgram("white\n", &first); // [HGM] book: send 'go' separately
  }
  bookHit = SendMoveToBookUser(forwardMostMove-1, &first, TRUE); // [HGM] book: send go or retrieve book move
  SetMachineThinkingEnables();
  first.maybeThinking = TRUE;
  StartClocks();
  firstMove = FALSE;

  if (appData.autoFlipView && !flipView) {
    flipView = !flipView;
    DrawPosition(FALSE, NULL);
    DisplayBothClocks();       // [HGM] logo: clocks might have to be exchanged;
  }

  if(bookHit) { // [HGM] book: simulate book reply
    static char bookMove[MSG_SIZ]; // a bit generous?

    programStats.nodes = programStats.depth = programStats.time =
      programStats.score = programStats.got_only_move = 0;
    sprintf(programStats.movelist, "%s (xbook)", bookHit);

    safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
    strcat(bookMove, bookHit);
    savedMessage = bookMove; // args for deferred call
    savedState = &first;
    ScheduleDelayedEvent(DeferredBookMove, 1);
  }
}

void MachineBlackEvent ()
{
  char buf[MSG_SIZ];
  char *bookHit = NULL;

  if (appData.noChessProgram || (gameMode == MachinePlaysBlack))
    return;


  if (gameMode == PlayFromGameFile ||
      gameMode == TwoMachinesPlay  ||
      gameMode == Training         ||
      gameMode == AnalyzeMode      ||
      gameMode == EndOfGame)
    EditGameEvent();

  if (gameMode == EditPosition)
    EditPositionDone(TRUE);

  if (WhiteOnMove(currentMove)) {
    DisplayError(_("It is not Black's turn"), 0);
    return;
  }

  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile)
    ExitAnalyzeMode();

  if (gameMode == EditGame || gameMode == AnalyzeMode ||
      gameMode == AnalyzeFile)
    TruncateGame();

  ResurrectChessProgram();	/* in case it isn't running */
  gameMode = MachinePlaysBlack;
  pausing = FALSE;
  ModeHighlight();
  SetGameInfo();
  snprintf(buf, MSG_SIZ, "%s %s %s", gameInfo.white, _("vs."), gameInfo.black);
  DisplayTitle(buf);
  if (first.sendName) {
    snprintf(buf, MSG_SIZ, "name %s\n", gameInfo.white);
    SendToProgram(buf, &first);
  }
  if (first.sendTime) {
    if (first.useColors) {
      SendToProgram("white\n", &first); /*gnu kludge*/
    }
    SendTimeRemaining(&first, FALSE);
  }
  if (first.useColors) {
    SendToProgram("black\n", &first); // [HGM] book: 'go' sent separately
  }
  bookHit = SendMoveToBookUser(forwardMostMove-1, &first, TRUE); // [HGM] book: send go or retrieve book move
  SetMachineThinkingEnables();
  first.maybeThinking = TRUE;
  StartClocks();

  if (appData.autoFlipView && flipView) {
    flipView = !flipView;
    DrawPosition(FALSE, NULL);
    DisplayBothClocks();       // [HGM] logo: clocks might have to be exchanged;
  }
  if(bookHit) { // [HGM] book: simulate book reply
    static char bookMove[MSG_SIZ]; // a bit generous?

    programStats.nodes = programStats.depth = programStats.time =
      programStats.score = programStats.got_only_move = 0;
    sprintf(programStats.movelist, "%s (xbook)", bookHit);

    safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
    strcat(bookMove, bookHit);
    savedMessage = bookMove; // args for deferred call
    savedState = &first;
    ScheduleDelayedEvent(DeferredBookMove, 1);
  }
}


void DisplayTwoMachinesTitle ()
{
  char buf[MSG_SIZ];
  if (appData.matchGames > 0) {
    if(appData.tourneyFile[0]) {
      snprintf(buf, MSG_SIZ, "%s %s %s (%d/%d%s)",
          gameInfo.white, _("vs."), gameInfo.black,
          nextGame+1, appData.matchGames+1,
          appData.tourneyType>0 ? "gt" : appData.tourneyType<0 ? "sw" : "rr");
    } else
      if (first.twoMachinesColor[0] == 'w') {
        snprintf(buf, MSG_SIZ, "%s %s %s (%d-%d-%d)",
            gameInfo.white, _("vs."),  gameInfo.black,
            first.matchWins, second.matchWins,
            matchGame - 1 - (first.matchWins + second.matchWins));
      } else {
        snprintf(buf, MSG_SIZ, "%s %s %s (%d-%d-%d)",
            gameInfo.white, _("vs."), gameInfo.black,
            second.matchWins, first.matchWins,
            matchGame - 1 - (first.matchWins + second.matchWins));
      }
  } else {
    snprintf(buf, MSG_SIZ, "%s %s %s", gameInfo.white, _("vs."), gameInfo.black);
  }
  DisplayTitle(buf);
}

void SettingsMenuIfReady ()
{
  if (second.lastPing != second.lastPong) {
    DisplayMessage("", _("Waiting for second chess program"));
    ScheduleDelayedEvent(SettingsMenuIfReady, 10); // [HGM] fast: lowered from 1000
    return;
  }
  ThawUI();
  DisplayMessage("", "");
  SettingsPopUp(&second);
}

int WaitForEngine (ChessProgramState *cps, DelayedEventCallback retry)
{
  char buf[MSG_SIZ];
  if (cps->pr == NoProc) {
    StartChessProgram(cps);
    if (cps->protocolVersion == 1) {
      retry();
      ScheduleDelayedEvent(retry, 1); // Do this also through timeout to avoid recursive calling of 'retry'
    } else {
      /* kludge: allow timeout for initial "feature" command */
      if(retry != TwoMachinesEventIfReady) FreezeUI();
      snprintf(buf, MSG_SIZ, _("Starting %s chess program"), _(cps->which));
      DisplayMessage("", buf);
      ScheduleDelayedEvent(retry, FEATURE_TIMEOUT);
    }
    return 1;
  }
  return 0;
}

void TwoMachinesEvent P((void))
{
  int i, move = forwardMostMove;
  char buf[MSG_SIZ];
  ChessProgramState *onmove;
  char *bookHit = NULL;
  static int stalling = 0;
  TimeMark now;
  long wait;

  if (appData.noChessProgram) return;

  switch (gameMode) {
    case TwoMachinesPlay:
      return;
    case MachinePlaysWhite:
    case MachinePlaysBlack:
      if (WhiteOnMove(forwardMostMove) == (gameMode == MachinePlaysWhite)) {
        DisplayError(_("Wait until your turn,\nor select 'Move Now'."), 0);
        return;
      }
      /* fall through */
    case BeginningOfGame:
    case PlayFromGameFile:
    case EndOfGame:
      EditGameEvent();
      if (gameMode != EditGame) return;
      break;
    case EditPosition:
      EditPositionDone(TRUE);
      break;
    case AnalyzeMode:
    case AnalyzeFile:
      ExitAnalyzeMode();
      break;
    case EditGame:
    default:
      break;
  }

  //    forwardMostMove = currentMove;
  TruncateGame(); // [HGM] vari: MachineWhite and MachineBlack do this...
  startingEngine = TRUE;

  if(!ResurrectChessProgram()) return;   /* in case first program isn't running (unbalances its ping due to InitChessProgram!) */

  if(!first.initDone && GetDelayedEvent() == TwoMachinesEventIfReady) return; // [HGM] engine #1 still waiting for feature timeout
  if(first.lastPing != first.lastPong) { // [HGM] wait till we are sure first engine has set up position
    ScheduleDelayedEvent(TwoMachinesEventIfReady, 10);
    return;
  }
  if(!appData.epd) {
    if(WaitForEngine(&second, TwoMachinesEventIfReady)) return; // (if needed:) started up second engine, so wait for features

    if(!SupportedVariant(second.variants, gameInfo.variant, gameInfo.boardWidth,
          gameInfo.boardHeight, gameInfo.holdingsSize, second.protocolVersion, second.tidy)) {
      startingEngine = matchMode = FALSE;
      DisplayError("second engine does not play this", 0);
      gameMode = TwoMachinesPlay; ModeHighlight(); // Needed to make sure menu item is unchecked
      EditGameEvent(); // switch back to EditGame mode
      return;
    }

    if(!stalling) {
      InitChessProgram(&second, FALSE); // unbalances ping of second engine
      SendToProgram("force\n", &second);
      stalling = 1;
      ScheduleDelayedEvent(TwoMachinesEventIfReady, 10);
      return;
    }
  }
  GetTimeMark(&now); // [HGM] matchpause: implement match pause after engine load
  if(appData.matchPause>10000 || appData.matchPause<10)
    appData.matchPause = 10000; /* [HGM] make pause adjustable */
  wait = SubtractTimeMarks(&now, &pauseStart);
  if(wait < appData.matchPause) {
    ScheduleDelayedEvent(TwoMachinesEventIfReady, appData.matchPause - wait);
    return;
  }
  // we are now committed to starting the game
  stalling = 0;
  DisplayMessage("", "");
  if(!appData.epd) {
    if (startedFromSetupPosition) {
      SendBoard(&second, backwardMostMove);
      if (appData.debugMode) {
        fprintf(debugFP, "Two Machines\n");
      }
    }
    for (i = backwardMostMove; i < forwardMostMove; i++) {
      SendMoveToProgram(i, &second);
    }
  }

  gameMode = TwoMachinesPlay;
  pausing = startingEngine = FALSE;
  ModeHighlight(); // [HGM] logo: this triggers display update of logos
  SetGameInfo();
  DisplayTwoMachinesTitle();
  firstMove = TRUE;
  if ((first.twoMachinesColor[0] == 'w') == WhiteOnMove(forwardMostMove)) {
    onmove = &first;
  } else {
    onmove = &second;
  }
  if(appData.debugMode) fprintf(debugFP, "New game (%d): %s-%s (%c)\n", matchGame, first.tidy, second.tidy, first.twoMachinesColor[0]);
  SendToProgram(first.computerString, &first);
  if (first.sendName) {
    snprintf(buf, MSG_SIZ, "name %s\n", second.tidy);
    SendToProgram(buf, &first);
  }
  if(!appData.epd) {
    SendToProgram(second.computerString, &second);
    if (second.sendName) {
      snprintf(buf, MSG_SIZ, "name %s\n", first.tidy);
      SendToProgram(buf, &second);
    }
  }

  if (!first.sendTime || !second.sendTime || move == 0) {
    ResetClocks();
    timeRemaining[0][forwardMostMove] = whiteTimeRemaining;
    timeRemaining[1][forwardMostMove] = blackTimeRemaining;
  }
  if (onmove->sendTime) {
    if (onmove->useColors) {
      SendToProgram(onmove->other->twoMachinesColor, onmove); /*gnu kludge*/
    }
    SendTimeRemaining(onmove, WhiteOnMove(forwardMostMove));
  }
  if (onmove->useColors) {
    SendToProgram(onmove->twoMachinesColor, onmove);
  }
  bookHit = SendMoveToBookUser(forwardMostMove-1, onmove, TRUE); // [HGM] book: send go or retrieve book move
  //    SendToProgram("go\n", onmove);
  onmove->maybeThinking = TRUE;
  SetMachineThinkingEnables();

  StartClocks();

  if(bookHit) { // [HGM] book: simulate book reply
    static char bookMove[MSG_SIZ]; // a bit generous?

    programStats.nodes = programStats.depth = programStats.time =
      programStats.score = programStats.got_only_move = 0;
    sprintf(programStats.movelist, "%s (xbook)", bookHit);

    safeStrCpy(bookMove, "move ", sizeof(bookMove)/sizeof(bookMove[0]));
    strcat(bookMove, bookHit);
    savedMessage = bookMove; // args for deferred call
    savedState = onmove;
    ScheduleDelayedEvent(DeferredBookMove, 1);
  }
}

void TrainingEvent ()
{
  if (gameMode == Training) {
    SetTrainingModeOff();
    gameMode = PlayFromGameFile;
    DisplayMessage("", _("Training mode off"));
  } else {
    gameMode = Training;
    animateTraining = appData.animate;

    /* make sure we are not already at the end of the game */
    if (currentMove < forwardMostMove) {
      SetTrainingModeOn();
      DisplayMessage("", _("Training mode on"));
    } else {
      gameMode = PlayFromGameFile;
      DisplayError(_("Already at end of game"), 0);
    }
  }
  ModeHighlight();
}

void IcsClientEvent ()
{
  if (!appData.icsActive) return;
  switch (gameMode) {
    case IcsPlayingWhite:
    case IcsPlayingBlack:
    case IcsObserving:
    case IcsIdle:
    case BeginningOfGame:
    case IcsExamining:
      return;

    case EditGame:
      break;

    case EditPosition:
      EditPositionDone(TRUE);
      break;

    case AnalyzeMode:
    case AnalyzeFile:
      ExitAnalyzeMode();
      break;

    default:
      EditGameEvent();
      break;
  }

  gameMode = IcsIdle;
  ModeHighlight();
  return;
}

void EditGameEvent ()
{
  int i;

  switch (gameMode) {
    case Training:
      SetTrainingModeOff();
      break;
    case MachinePlaysWhite:
    case MachinePlaysBlack:
    case BeginningOfGame:
      SendToProgram("force\n", &first);
      if(gameMode == (forwardMostMove & 1 ? MachinePlaysBlack : MachinePlaysWhite)) { // engine is thinking
        if (first.usePing) { // [HGM] always send ping when we might interrupt machine thinking
          char buf[MSG_SIZ];
          abortEngineThink = TRUE;
          snprintf(buf, MSG_SIZ, "ping %d\n", initPing = ++first.lastPing);
          SendToProgram(buf, &first);
          DisplayMessage("Aborting engine think", "");
          FreezeUI();
        }
      }
      SetUserThinkingEnables();
      break;
    case PlayFromGameFile:
      (void) StopLoadGameTimer();
      if (gameFileFP != NULL) {
        gameFileFP = NULL;
      }
      break;
    case EditPosition:
      EditPositionDone(TRUE);
      break;
    case AnalyzeMode:
    case AnalyzeFile:
      ExitAnalyzeMode();
      SendToProgram("force\n", &first);
      break;
    case TwoMachinesPlay:
      GameEnds(EndOfFile, NULL, GE_PLAYER);
      ResurrectChessProgram();
      SetUserThinkingEnables();
      break;
    case EndOfGame:
      ResurrectChessProgram();
      break;
    case IcsPlayingBlack:
    case IcsPlayingWhite:
      DisplayError(_("Warning: You are still playing a game"), 0);
      break;
    case IcsObserving:
      DisplayError(_("Warning: You are still observing a game"), 0);
      break;
    case IcsExamining:
      DisplayError(_("Warning: You are still examining a game"), 0);
      break;
    case IcsIdle:
      break;
    case EditGame:
    default:
      return;
  }

  pausing = FALSE;
  StopClocks();
  first.offeredDraw = second.offeredDraw = 0;

  if (gameMode == PlayFromGameFile) {
    whiteTimeRemaining = timeRemaining[0][currentMove];
    blackTimeRemaining = timeRemaining[1][currentMove];
    DisplayTitle("");
  }

  if (gameMode == MachinePlaysWhite ||
      gameMode == MachinePlaysBlack ||
      gameMode == TwoMachinesPlay ||
      gameMode == EndOfGame) {
    i = forwardMostMove;
    while (i > currentMove) {
      SendToProgram("undo\n", &first);
      i--;
    }
    if(!adjustedClock) {
      whiteTimeRemaining = timeRemaining[0][currentMove];
      blackTimeRemaining = timeRemaining[1][currentMove];
      DisplayBothClocks();
    }
    if (whiteFlag || blackFlag) {
      whiteFlag = blackFlag = 0;
    }
    DisplayTitle("");
  }

  gameMode = EditGame;
  ModeHighlight();
  SetGameInfo();
}

void EditPositionEvent ()
{
  int i;
  if (gameMode == EditPosition) {
    EditGameEvent();
    return;
  }

  EditGameEvent();
  if (gameMode != EditGame) return;

  gameMode = EditPosition;
  ModeHighlight();
  SetGameInfo();
  CopyBoard(rightsBoard, nullBoard);
  if (currentMove > 0)
    CopyBoard(boards[0], boards[currentMove]);
  for(i=0; i<nrCastlingRights; i++) if(boards[0][CASTLING][i] != NoRights)
    rightsBoard[castlingRank[i]][boards[0][CASTLING][i]] = 1; // copy remaining rights

  blackPlaysFirst = !WhiteOnMove(currentMove);
  ResetClocks();
  currentMove = forwardMostMove = backwardMostMove = 0;
  HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);
  DisplayMove(-1);
  if(!appData.pieceMenu) DisplayMessage(_("Click clock to clear board"), "");
}

void ExitAnalyzeMode ()
{
  /* [DM] icsEngineAnalyze - possible call from other functions */
  if (appData.icsEngineAnalyze) {
    appData.icsEngineAnalyze = FALSE;

    DisplayMessage("",_("Close ICS engine analyze..."));
  }
  if (first.analysisSupport && first.analyzing) {
    SendToBoth("exit\n");
    first.analyzing = second.analyzing = FALSE;
  }
  thinkOutput[0] = NULLCHAR;
}

void EditPositionDone (Boolean fakeRights)
{
  int king = gameInfo.variant == VariantKnightmate ? WhiteUnicorn : WhiteKing;

  startedFromSetupPosition = TRUE;
  InitChessProgram(&first, FALSE);
  if(fakeRights) { // [HGM] suppress this if we just pasted a FEN.
    int r, f;
    boards[0][EP_STATUS] = EP_NONE;
    for(f=0; f<=nrCastlingRights; f++) boards[0][CASTLING][f] = NoRights;
    for(r=BOARD_HEIGHT-1; r>=0; r--) for(f=BOARD_RGHT-1; f>=BOARD_LEFT; f--) { // first pass: Kings & e.p.
      if(rightsBoard[r][f]) {
        ChessSquare p = boards[0][r][f];
        if(p == (blackPlaysFirst ? WhitePawn : BlackPawn)) boards[0][EP_STATUS] = f;
        else if(p == king) boards[0][CASTLING][2] = f;
        else if(p == WHITE_TO_BLACK king) boards[0][CASTLING][5] = f;
        else rightsBoard[r][f] = 2; // mark for second pass
      }
    }
    for(r=BOARD_HEIGHT-1; r>=0; r--) for(f=BOARD_RGHT-1; f>=BOARD_LEFT; f--) { // second pass: Rooks
      if(rightsBoard[r][f] == 2) {
        ChessSquare p = boards[0][r][f];
        if(p == WhiteRook) boards[0][CASTLING][(f < boards[0][CASTLING][2])] = f; else
          if(p == BlackRook) boards[0][CASTLING][(f < boards[0][CASTLING][5])+3] = f;
      }
    }
  }
  SendToProgram("force\n", &first);
  if (blackPlaysFirst) {
    safeStrCpy(moveList[0], "", sizeof(moveList[0])/sizeof(moveList[0][0]));
    safeStrCpy(parseList[0], "", sizeof(parseList[0])/sizeof(parseList[0][0]));
    currentMove = forwardMostMove = backwardMostMove = 1;
    CopyBoard(boards[1], boards[0]);
  } else {
    currentMove = forwardMostMove = backwardMostMove = 0;
  }
  SendBoard(&first, forwardMostMove);
  if (appData.debugMode) {
    fprintf(debugFP, "EditPosDone\n");
  }
  DisplayTitle("");
  DisplayMessage("", "");
  timeRemaining[0][forwardMostMove] = whiteTimeRemaining;
  timeRemaining[1][forwardMostMove] = blackTimeRemaining;
  gameMode = EditGame;
  ModeHighlight();
  HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);
  ClearHighlights(); /* [AS] */
}

/* Pause for `ms' milliseconds */
/* !! Ugh, this is a kludge. Fix it sometime. --tpm */
void TimeDelay (long ms)
{
  TimeMark m1, m2;

  GetTimeMark(&m1);
  do {
    GetTimeMark(&m2);
  } while (SubtractTimeMarks(&m2, &m1) < ms);
}

/* !! Ugh, this is a kludge. Fix it sometime. --tpm */
void SendMultiLineToICS (char *buf)
{
  char temp[MSG_SIZ+1], *p;
  int len;

  len = strlen(buf);
  if (len > MSG_SIZ)
    len = MSG_SIZ;

  strncpy(temp, buf, len);
  temp[len] = 0;

  p = temp;
  while (*p) {
    if (*p == '\n' || *p == '\r')
      *p = ' ';
    ++p;
  }

  strcat(temp, "\n");
  SendToICS(temp);
  SendToPlayer(temp, strlen(temp));
}

void SetWhiteToPlayEvent ()
{
  if (gameMode == EditPosition) {
    blackPlaysFirst = FALSE;
    DisplayBothClocks();	/* works because currentMove is 0 */
  } else if (gameMode == IcsExamining) {
    SendToICS(ics_prefix);
    SendToICS("tomove white\n");
  }
}

void SetBlackToPlayEvent ()
{
  if (gameMode == EditPosition) {
    blackPlaysFirst = TRUE;
    currentMove = 1;	/* kludge */
    DisplayBothClocks();
    currentMove = 0;
  } else if (gameMode == IcsExamining) {
    SendToICS(ics_prefix);
    SendToICS("tomove black\n");
  }
}

void EditPositionMenuEvent (ChessSquare selection, int x, int y)
{
  char buf[MSG_SIZ];
  ChessSquare piece = boards[0][y][x];
  static Board erasedBoard, currentBoard, menuBoard, nullBoard;
  static int lastVariant;
  int baseRank = BOARD_HEIGHT-1, hasRights = 0;

  if (gameMode != EditPosition && gameMode != IcsExamining) return;

  switch (selection) {
    case ClearBoard:
      fromX = fromY = killX = killY = kill2X = kill2Y = -1; // [HGM] abort any move entry in progress
      MarkTargetSquares(1);
      CopyBoard(currentBoard, boards[0]);
      CopyBoard(menuBoard, initialPosition);
      if (gameMode == IcsExamining && ics_type == ICS_FICS) {
        SendToICS(ics_prefix);
        SendToICS("bsetup clear\n");
      } else if (gameMode == IcsExamining && ics_type == ICS_ICC) {
        SendToICS(ics_prefix);
        SendToICS("clearboard\n");
      } else {
        int nonEmpty = 0;
        for (x = 0; x < BOARD_WIDTH; x++) { ChessSquare p = EmptySquare;
          if(x == BOARD_LEFT-1 || x == BOARD_RGHT) p = (ChessSquare) 0; /* [HGM] holdings */
          for (y = 0; y < BOARD_HEIGHT; y++) {
            if (gameMode == IcsExamining) {
              if (boards[currentMove][y][x] != EmptySquare) {
                snprintf(buf, MSG_SIZ, "%sx@%c%c\n", ics_prefix,
                    AAA + x, ONE + y);
                SendToICS(buf);
              }
            } else if(boards[0][y][x] != DarkSquare) {
              if(boards[0][y][x] != p) nonEmpty++;
              boards[0][y][x] = p;
            }
          }
        }
        CopyBoard(rightsBoard, nullBoard);
        if(gameMode != IcsExamining) { // [HGM] editpos: cycle trough boards
          int r, i;
          for(r = 0; r < BOARD_HEIGHT; r++) {
            for(x = BOARD_LEFT; x < BOARD_RGHT; x++) { // create 'menu board' by removing duplicates 
              ChessSquare p = menuBoard[r][x];
              for(y = x + 1; y < BOARD_RGHT; y++) if(menuBoard[r][y] == p) menuBoard[r][y] = EmptySquare;
            }
          }
          menuBoard[CASTLING][0] = menuBoard[CASTLING][3] = NoRights; // h-side Rook was deleted
          DisplayMessage("Clicking clock again restores position", "");
          if(gameInfo.variant != lastVariant) lastVariant = gameInfo.variant, CopyBoard(erasedBoard, boards[0]);
          if(!nonEmpty) { // asked to clear an empty board
            CopyBoard(boards[0], menuBoard);
          } else
            if(CompareBoards(currentBoard, menuBoard)) { // asked to clear an empty board
              CopyBoard(boards[0], initialPosition);
            } else
              if(CompareBoards(currentBoard, initialPosition) && !CompareBoards(currentBoard, erasedBoard)
                  && !CompareBoards(nullBoard, erasedBoard)) {
                CopyBoard(boards[0], erasedBoard);
              } else
                CopyBoard(erasedBoard, currentBoard);

          for(i=0; i<nrCastlingRights; i++) if(boards[0][CASTLING][i] != NoRights)
            rightsBoard[castlingRank[i]][boards[0][CASTLING][i]] = 1; // copy remaining rights
        }
      }
      if (gameMode == EditPosition) {
        DrawPosition(FALSE, boards[0]);
      }
      break;

    case WhitePlay:
      SetWhiteToPlayEvent();
      break;

    case BlackPlay:
      SetBlackToPlayEvent();
      break;

    case EmptySquare:
      if (gameMode == IcsExamining) {
        if (x < BOARD_LEFT || x >= BOARD_RGHT) break; // [HGM] holdings
        snprintf(buf, MSG_SIZ, "%sx@%c%c\n", ics_prefix, AAA + x, ONE + y);
        SendToICS(buf);
      } else {
        if(x < BOARD_LEFT || x >= BOARD_RGHT) {
          if(x == BOARD_LEFT-2) {
            if(y < BOARD_HEIGHT-1-gameInfo.holdingsSize) break;
            boards[0][y][1] = 0;
          } else
            if(x == BOARD_RGHT+1) {
              if(y >= gameInfo.holdingsSize) break;
              boards[0][y][BOARD_WIDTH-2] = 0;
            } else break;
        }
        boards[0][y][x] = EmptySquare;
        DrawPosition(FALSE, boards[0]);
      }
      break;

    case PromotePiece:
      if(piece >= (int)WhitePawn && piece < (int)WhiteMan ||
          piece >= (int)BlackPawn && piece < (int)BlackMan   ) {
        selection = (ChessSquare) (PROMOTED(piece));
      } else if(piece == EmptySquare) selection = WhiteSilver;
      else selection = (ChessSquare)((int)piece - 1);
      goto defaultlabel;

    case DemotePiece:
      if(piece > (int)WhiteMan && piece <= (int)WhiteKing ||
          piece > (int)BlackMan && piece <= (int)BlackKing   ) {
        selection = (ChessSquare) (DEMOTED(piece));
      } else if(piece == EmptySquare) selection = BlackSilver;
      else selection = (ChessSquare)((int)piece + 1);
      goto defaultlabel;

    case WhiteQueen:
    case BlackQueen:
      if(gameInfo.variant == VariantShatranj ||
          gameInfo.variant == VariantXiangqi  ||
          gameInfo.variant == VariantCourier  ||
          gameInfo.variant == VariantASEAN    ||
          gameInfo.variant == VariantMakruk     )
        selection = (ChessSquare)((int)selection - (int)WhiteQueen + (int)WhiteFerz);
      goto defaultlabel;

    case WhiteRook:
      baseRank = 0;
    case BlackRook:
      if(y == baseRank && (x == BOARD_LEFT || x == BOARD_RGHT-1 || appData.fischerCastling)) hasRights = 1;
      if(y == baseRank && (x == BOARD_WIDTH>>1 || appData.fischerCastling)) hasRights = 1;
      goto defaultlabel;

    case WhiteKing:
      baseRank = 0;
    case BlackKing:
      if(gameInfo.variant == VariantXiangqi)
        selection = (ChessSquare)((int)selection - (int)WhiteKing + (int)WhiteWazir);
      if(gameInfo.variant == VariantKnightmate)
        selection = (ChessSquare)((int)selection - (int)WhiteKing + (int)WhiteUnicorn);
      if(y == baseRank && (x == BOARD_WIDTH>>1 || appData.fischerCastling)) hasRights = 1;
    default:
defaultlabel:
      if (gameMode == IcsExamining) {
        if (x < BOARD_LEFT || x >= BOARD_RGHT) break; // [HGM] holdings
        snprintf(buf, MSG_SIZ, "%s%c@%c%c\n", ics_prefix,
            PieceToChar(selection), AAA + x, ONE + y);
        SendToICS(buf);
      } else {
        rightsBoard[y][x] = hasRights;
        if(x < BOARD_LEFT || x >= BOARD_RGHT) {
          int n;
          if(x == BOARD_LEFT-2 && selection >= BlackPawn) {
            n = PieceToNumber(selection - BlackPawn);
            if(n >= gameInfo.holdingsSize) { n = 0; selection = BlackPawn; }
            boards[0][BOARD_HEIGHT-1-n][0] = selection;
            boards[0][BOARD_HEIGHT-1-n][1]++;
          } else
            if(x == BOARD_RGHT+1 && selection < BlackPawn) {
              n = PieceToNumber(selection);
              if(n >= gameInfo.holdingsSize) { n = 0; selection = WhitePawn; }
              boards[0][n][BOARD_WIDTH-1] = selection;
              boards[0][n][BOARD_WIDTH-2]++;
            }
        } else
          boards[0][y][x] = selection;
        DrawPosition(TRUE, boards[0]);
        ClearHighlights();
        fromX = fromY = -1;
      }
      break;
  }
}


void DropMenuEvent (ChessSquare selection, int x, int y)
{
  ChessMove moveType;

  switch (gameMode) {
    case IcsPlayingWhite:
    case MachinePlaysBlack:
      if (!WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is Black's turn"));
        return;
      }
      moveType = WhiteDrop;
      break;
    case IcsPlayingBlack:
    case MachinePlaysWhite:
      if (WhiteOnMove(currentMove)) {
        DisplayMoveError(_("It is White's turn"));
        return;
      }
      moveType = BlackDrop;
      break;
    case EditGame:
      moveType = WhiteOnMove(currentMove) ? WhiteDrop : BlackDrop;
      break;
    default:
      return;
  }

  if (moveType == BlackDrop && selection < BlackPawn) {
    selection = (ChessSquare) ((int) selection
        + (int) BlackPawn - (int) WhitePawn);
  }
  if (boards[currentMove][y][x] != EmptySquare) {
    DisplayMoveError(_("That square is occupied"));
    return;
  }

  FinishMove(moveType, (int) selection, DROP_RANK, x, y, NULLCHAR);
}

void AcceptEvent ()
{
  /* Accept a pending offer of any kind from opponent */

  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("accept\n");
  } else if (cmailMsgLoaded) {
    if (currentMove == cmailOldMove &&
        commentList[cmailOldMove] != NULL &&
        StrStr(commentList[cmailOldMove], WhiteOnMove(cmailOldMove) ?
          "Black offers a draw" : "White offers a draw")) {
      TruncateGame();
      GameEnds(GameIsDrawn, "Draw agreed", GE_PLAYER);
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_ACCEPT;
    } else {
      DisplayError(_("There is no pending offer on this move"), 0);
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_MOVE;
    }
  } else {
    /* Not used for offers from chess program */
  }
}

void DeclineEvent ()
{
  /* Decline a pending offer of any kind from opponent */

  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("decline\n");
  } else if (cmailMsgLoaded) {
    if (currentMove == cmailOldMove &&
        commentList[cmailOldMove] != NULL &&
        StrStr(commentList[cmailOldMove], WhiteOnMove(cmailOldMove) ?
          "Black offers a draw" : "White offers a draw")) {
#ifdef NOTDEF
      AppendComment(cmailOldMove, "Draw declined", TRUE);
      DisplayComment(cmailOldMove - 1, "Draw declined");
#endif /*NOTDEF*/
    } else {
      DisplayError(_("There is no pending offer on this move"), 0);
    }
  } else {
    /* Not used for offers from chess program */
  }
}

void RematchEvent ()
{
  /* Issue ICS rematch command */
  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("rematch\n");
  }
}

void CallFlagEvent ()
{
  /* Call your opponent's flag (claim a win on time) */
  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("flag\n");
  } else {
    switch (gameMode) {
      default:
        return;
      case MachinePlaysWhite:
        if (whiteFlag) {
          if (blackFlag)
            GameEnds(GameIsDrawn, "Both players ran out of time",
                GE_PLAYER);
          else
            GameEnds(BlackWins, "Black wins on time", GE_PLAYER);
        } else {
          DisplayError(_("Your opponent is not out of time"), 0);
        }
        break;
      case MachinePlaysBlack:
        if (blackFlag) {
          if (whiteFlag)
            GameEnds(GameIsDrawn, "Both players ran out of time",
                GE_PLAYER);
          else
            GameEnds(WhiteWins, "White wins on time", GE_PLAYER);
        } else {
          DisplayError(_("Your opponent is not out of time"), 0);
        }
        break;
    }
  }
}

void ClockClick (int which)
{	// [HGM] code moved to back-end from winboard.c
  if(which) { // black clock
    if (gameMode == EditPosition || gameMode == IcsExamining) {
      if(!appData.pieceMenu && blackPlaysFirst) EditPositionMenuEvent(ClearBoard, 0, 0);
      SetBlackToPlayEvent();
    } else if ((gameMode == AnalyzeMode || gameMode == EditGame ||
          gameMode == MachinePlaysBlack && PosFlags(0) & F_NULL_MOVE && !blackFlag && !shiftKey) && WhiteOnMove(currentMove)) {
      UserMoveEvent((int)EmptySquare, DROP_RANK, 0, 0, 0); // [HGM] multi-move: if not out of time, enters null move
    } else if (shiftKey) {
      AdjustClock(which, -1);
    } else if (gameMode == IcsPlayingWhite ||
        gameMode == MachinePlaysBlack) {
      CallFlagEvent();
    }
  } else { // white clock
    if (gameMode == EditPosition || gameMode == IcsExamining) {
      if(!appData.pieceMenu && !blackPlaysFirst) EditPositionMenuEvent(ClearBoard, 0, 0);
      SetWhiteToPlayEvent();
    } else if ((gameMode == AnalyzeMode || gameMode == EditGame ||
          gameMode == MachinePlaysWhite && PosFlags(0) & F_NULL_MOVE && !whiteFlag && !shiftKey) && !WhiteOnMove(currentMove)) {
      UserMoveEvent((int)EmptySquare, DROP_RANK, 0, 0, 0); // [HGM] multi-move
    } else if (shiftKey) {
      AdjustClock(which, -1);
    } else if (gameMode == IcsPlayingBlack ||
        gameMode == MachinePlaysWhite) {
      CallFlagEvent();
    }
  }
}

void DrawEvent ()
{
  /* Offer draw or accept pending draw offer from opponent */

  if (appData.icsActive) {
    /* Note: tournament rules require draw offers to be
       made after you make your move but before you punch
       your clock.  Currently ICS doesn't let you do that;
       instead, you immediately punch your clock after making
       a move, but you can offer a draw at any time. */

    SendToICS(ics_prefix);
    SendToICS("draw\n");
    userOfferedDraw = TRUE; // [HGM] drawclaim: also set flag in ICS play
  } else if (cmailMsgLoaded) {
    if (currentMove == cmailOldMove &&
        commentList[cmailOldMove] != NULL &&
        StrStr(commentList[cmailOldMove], WhiteOnMove(cmailOldMove) ?
          "Black offers a draw" : "White offers a draw")) {
      GameEnds(GameIsDrawn, "Draw agreed", GE_PLAYER);
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_ACCEPT;
    } else if (currentMove == cmailOldMove + 1) {
      char *offer = WhiteOnMove(cmailOldMove) ?
        "White offers a draw" : "Black offers a draw";
      AppendComment(currentMove, offer, TRUE);
      DisplayComment(currentMove - 1, offer);
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_DRAW;
    } else {
      DisplayError(_("You must make your move before offering a draw"), 0);
      cmailMoveType[lastLoadGameNumber - 1] = CMAIL_MOVE;
    }
  } else if (first.offeredDraw) {
    GameEnds(GameIsDrawn, "Draw agreed", GE_XBOARD);
  } else {
    if (first.sendDrawOffers) {
      SendToProgram("draw\n", &first);
      userOfferedDraw = TRUE;
    }
  }
}

void AdjournEvent ()
{
  /* Offer Adjourn or accept pending Adjourn offer from opponent */

  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("adjourn\n");
  } else {
    /* Currently GNU Chess doesn't offer or accept Adjourns */
  }
}


void AbortEvent ()
{
  /* Offer Abort or accept pending Abort offer from opponent */

  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("abort\n");
  } else {
    GameEnds(GameUnfinished, "Game aborted", GE_PLAYER);
  }
}

void ResignEvent ()
{
  /* Resign.  You can do this even if it's not your turn. */

  if (appData.icsActive) {
    SendToICS(ics_prefix);
    SendToICS("resign\n");
  } else {
    switch (gameMode) {
      case MachinePlaysWhite:
        GameEnds(WhiteWins, "Black resigns", GE_PLAYER);
        break;
      case MachinePlaysBlack:
        GameEnds(BlackWins, "White resigns", GE_PLAYER);
        break;
      case EditGame:
        if (cmailMsgLoaded) {
          TruncateGame();
          if (WhiteOnMove(cmailOldMove)) {
            GameEnds(BlackWins, "White resigns", GE_PLAYER);
          } else {
            GameEnds(WhiteWins, "Black resigns", GE_PLAYER);
          }
          cmailMoveType[lastLoadGameNumber - 1] = CMAIL_RESIGN;
        }
        break;
      default:
        break;
    }
  }
}


void StopObservingEvent ()
{
  /* Stop observing current games */
  SendToICS(ics_prefix);
  SendToICS("unobserve\n");
}

void StopExaminingEvent ()
{
  /* Stop observing current game */
  SendToICS(ics_prefix);
  SendToICS("unexamine\n");
}

void ForwardInner (int target)
{
  int limit; int oldSeekGraphUp = seekGraphUp;

  if (appData.debugMode)
    fprintf(debugFP, "ForwardInner(%d), current %d, forward %d\n",
        target, currentMove, forwardMostMove);

  if (gameMode == EditPosition)
    return;

  seekGraphUp = FALSE;
  MarkTargetSquares(1);
  fromX = fromY = killX = killY = kill2X = kill2Y = -1; // [HGM] abort any move entry in progress

  if (gameMode == PlayFromGameFile && !pausing)
    PauseEvent();

  if (gameMode == IcsExamining && pausing)
    limit = pauseExamForwardMostMove;
  else
    limit = forwardMostMove;

  if (target > limit) target = limit;

  if (target > 0 && moveList[target - 1][0]) {
    int fromX, fromY, toX, toY;
    toX = moveList[target - 1][2] - AAA;
    toY = moveList[target - 1][3] - ONE;
    if (moveList[target - 1][1] == '@') {
      if (appData.highlightLastMove) {
        SetHighlights(-1, -1, toX, toY);
      }
    } else {
      fromX = moveList[target - 1][0] - AAA;
      fromY = moveList[target - 1][1] - ONE;
      if (target == currentMove + 1) {
        if(moveList[target - 1][4] == ';') { // multi-leg
          killX = moveList[target - 1][5] - AAA;
          killY = moveList[target - 1][6] - ONE;
        }
        AnimateMove(boards[currentMove], fromX, fromY, toX, toY);
        killX = killY = -1;
      }
      if (appData.highlightLastMove) {
        SetHighlights(fromX, fromY, toX, toY);
      }
    }
  }
  if (gameMode == EditGame || gameMode == AnalyzeMode ||
      gameMode == Training || gameMode == PlayFromGameFile ||
      gameMode == AnalyzeFile) {
    while (currentMove < target) {
      if(second.analyzing) SendMoveToProgram(currentMove, &second);
      SendMoveToProgram(currentMove++, &first);
    }
  } else {
    currentMove = target;
  }

  if (gameMode == EditGame || gameMode == EndOfGame) {
    whiteTimeRemaining = timeRemaining[0][currentMove];
    blackTimeRemaining = timeRemaining[1][currentMove];
  }
  DisplayBothClocks();
  DisplayMove(currentMove - 1);
  DrawPosition(oldSeekGraphUp, boards[currentMove]);
  HistorySet(parseList,backwardMostMove,forwardMostMove,currentMove-1);
  if ( !matchMode && gameMode != Training) { // [HGM] PV info: routine tests if empty
    DisplayComment(currentMove - 1, commentList[currentMove]);
  }
  ClearMap(); // [HGM] exclude: invalidate map
}


void ForwardEvent ()
{
  if (gameMode == IcsExamining && !pausing) {
    SendToICS(ics_prefix);
    SendToICS("forward\n");
  } else {
    ForwardInner(currentMove + 1);
  }
}

void ToEndEvent ()
{
  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
    /* to optimze, we temporarily turn off analysis mode while we feed
     * the remaining moves to the engine. Otherwise we get analysis output
     * after each move.
     */
    if (first.analysisSupport) {
      SendToProgram("exit\nforce\n", &first);
      first.analyzing = FALSE;
    }
  }

  if (gameMode == IcsExamining && !pausing) {
    SendToICS(ics_prefix);
    SendToICS("forward 999999\n");
  } else {
    ForwardInner(forwardMostMove);
  }

  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
    /* we have fed all the moves, so reactivate analysis mode */
    SendToProgram("analyze\n", &first);
    first.analyzing = TRUE;
    first.maybeThinking = TRUE;
    // first.maybeThinking = FALSE; // avoid killing GNU Chess
  }
}

void BackwardInner (int target)
{
  int full_redraw = TRUE; /* [AS] Was FALSE, had to change it! */

  if (appData.debugMode)
    fprintf(debugFP, "BackwardInner(%d), current %d, forward %d\n",
        target, currentMove, forwardMostMove);

  if (gameMode == EditPosition) return;
  seekGraphUp = FALSE;
  MarkTargetSquares(1);
  fromX = fromY = killX = killY = kill2X = kill2Y = -1; // [HGM] abort any move entry in progress
  if (currentMove <= backwardMostMove) {
    ClearHighlights();
    DrawPosition(full_redraw, boards[currentMove]);
    return;
  }
  if (gameMode == PlayFromGameFile && !pausing)
    PauseEvent();

  if (moveList[target][0]) {
    int fromX, fromY, toX, toY;
    toX = moveList[target][2] - AAA;
    toY = moveList[target][3] - ONE;
    if (moveList[target][1] == '@') {
      if (appData.highlightLastMove) {
        SetHighlights(-1, -1, toX, toY);
      }
    } else {
      fromX = moveList[target][0] - AAA;
      fromY = moveList[target][1] - ONE;
      if (target == currentMove - 1) {
        AnimateMove(boards[currentMove], toX, toY, fromX, fromY);
      }
      if (appData.highlightLastMove) {
        SetHighlights(fromX, fromY, toX, toY);
      }
    }
  }
  if (gameMode == EditGame || gameMode==AnalyzeMode ||
      gameMode == PlayFromGameFile || gameMode == AnalyzeFile) {
    while (currentMove > target) {
      if(moveList[currentMove-1][1] == '@' && moveList[currentMove-1][0] == '@') {
        // null move cannot be undone. Reload program with move history before it.
        int i;
        for(i=target; i>backwardMostMove; i--) { // seek back to start or previous null move
          if(moveList[i-1][1] == '@' && moveList[i-1][0] == '@') break;
        }
        SendBoard(&first, i);
        if(second.analyzing) SendBoard(&second, i);
        for(currentMove=i; currentMove<target; currentMove++) {
          SendMoveToProgram(currentMove, &first);
          if(second.analyzing) SendMoveToProgram(currentMove, &second);
        }
        break;
      }
      SendToBoth("undo\n");
      currentMove--;
    }
  } else {
    currentMove = target;
  }

  if (gameMode == EditGame || gameMode == EndOfGame) {
    whiteTimeRemaining = timeRemaining[0][currentMove];
    blackTimeRemaining = timeRemaining[1][currentMove];
  }
  DisplayBothClocks();
  DisplayMove(currentMove - 1);
  DrawPosition(full_redraw, boards[currentMove]);
  HistorySet(parseList,backwardMostMove,forwardMostMove,currentMove-1);
  // [HGM] PV info: routine tests if comment empty
  DisplayComment(currentMove - 1, commentList[currentMove]);
  ClearMap(); // [HGM] exclude: invalidate map
}

void BackwardEvent ()
{
  if (gameMode == IcsExamining && !pausing) {
    SendToICS(ics_prefix);
    SendToICS("backward\n");
  } else {
    BackwardInner(currentMove - 1);
  }
}

void ToStartEvent ()
{
  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
    /* to optimize, we temporarily turn off analysis mode while we undo
     * all the moves. Otherwise we get analysis output after each undo.
     */
    if (first.analysisSupport) {
      SendToProgram("exit\nforce\n", &first);
      first.analyzing = FALSE;
    }
  }

  if (gameMode == IcsExamining && !pausing) {
    SendToICS(ics_prefix);
    SendToICS("backward 999999\n");
  } else {
    BackwardInner(backwardMostMove);
  }

  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
    /* we have fed all the moves, so reactivate analysis mode */
    SendToProgram("analyze\n", &first);
    first.analyzing = TRUE;
    first.maybeThinking = TRUE;
    // first.maybeThinking = FALSE; // avoid killing GNU Chess
  }
}

void ToNrEvent (int to)
{
  if (gameMode == PlayFromGameFile && !pausing) PauseEvent();
  if (to >= forwardMostMove) to = forwardMostMove;
  if (to <= backwardMostMove) to = backwardMostMove;
  if (to < currentMove) {
    BackwardInner(to);
  } else {
    ForwardInner(to);
  }
}

void RevertEvent (Boolean annotate)
{
  if(PopTail(annotate)) { // [HGM] vari: restore old game tail
    return;
  }
  if (gameMode != IcsExamining) {
    DisplayError(_("You are not examining a game"), 0);
    return;
  }
  if (pausing) {
    DisplayError(_("You can't revert while pausing"), 0);
    return;
  }
  SendToICS(ics_prefix);
  SendToICS("revert\n");
}

void RetractMoveEvent ()
{
  switch (gameMode) {
    case MachinePlaysWhite:
    case MachinePlaysBlack:
      if (WhiteOnMove(forwardMostMove) == (gameMode == MachinePlaysWhite)) {
        DisplayError(_("Wait until your turn,\nor select 'Move Now'."), 0);
        return;
      }
      if (forwardMostMove < 2) return;
      currentMove = forwardMostMove = forwardMostMove - 2;
      whiteTimeRemaining = timeRemaining[0][currentMove];
      blackTimeRemaining = timeRemaining[1][currentMove];
      DisplayBothClocks();
      DisplayMove(currentMove - 1);
      ClearHighlights();/*!! could figure this out*/
      DrawPosition(TRUE, boards[currentMove]); /* [AS] Changed to full redraw! */
      SendToProgram("remove\n", &first);
      first.maybeThinking = TRUE;
      // first.maybeThinking = FALSE; // GNU Chess does not ponder here
      break;

    case BeginningOfGame:
    default:
      break;

    case IcsPlayingWhite:
    case IcsPlayingBlack:
      if (WhiteOnMove(forwardMostMove) == (gameMode == IcsPlayingWhite)) {
        SendToICS(ics_prefix);
        SendToICS("takeback 2\n");
      } else {
        SendToICS(ics_prefix);
        SendToICS("takeback 1\n");
      }
      break;
  }
}

void MoveNowEvent ()
{
  ChessProgramState *cps;

  switch (gameMode) {
    case MachinePlaysWhite:
      if (!WhiteOnMove(forwardMostMove)) {
        DisplayError(_("It is your turn"), 0);
        return;
      }
      cps = &first;
      break;
    case MachinePlaysBlack:
      if (WhiteOnMove(forwardMostMove)) {
        DisplayError(_("It is your turn"), 0);
        return;
      }
      cps = &first;
      break;
    case TwoMachinesPlay:
      if (WhiteOnMove(forwardMostMove) ==
          (first.twoMachinesColor[0] == 'w')) {
        cps = &first;
      } else {
        cps = &second;
      }
      break;
    case BeginningOfGame:
    default:
      return;
  }
  SendToProgram("?\n", cps);
}

void TruncateGameEvent ()
{
  EditGameEvent();
  if (gameMode != EditGame) return;
  TruncateGame();
}

void TruncateGame ()
{
  CleanupTail(); // [HGM] vari: only keep current variation if we explicitly truncate
  if (forwardMostMove > currentMove) {
    if (gameInfo.resultDetails != NULL) {
      free(gameInfo.resultDetails);
      gameInfo.resultDetails = NULL;
      gameInfo.result = GameUnfinished;
    }
    forwardMostMove = currentMove;
    HistorySet(parseList, backwardMostMove, forwardMostMove,
        currentMove-1);
  }
}

void HintEvent ()
{
  if (appData.noChessProgram) return;
  switch (gameMode) {
    case MachinePlaysWhite:
      if (WhiteOnMove(forwardMostMove)) {
        DisplayError(_("Wait until your turn."), 0);
        return;
      }
      break;
    case BeginningOfGame:
    case MachinePlaysBlack:
      if (!WhiteOnMove(forwardMostMove)) {
        DisplayError(_("Wait until your turn."), 0);
        return;
      }
      break;
    default:
      DisplayError(_("No hint available"), 0);
      return;
  }
  SendToProgram("hint\n", &first);
  hintRequested = TRUE;
}

int SaveSelected (FILE *g, int dummy, char *dummy2)
{
  ListGame * lg = (ListGame *) gameList.head;
  int nItem, cnt=0;
  FILE *f;

  if( !(f = GameFile()) || ((ListGame *) gameList.tailPred)->number <= 0 ) {
    DisplayError(_("Game list not loaded or empty"), 0);
    return 0;
  }

  creatingBook = TRUE; // suppresses stuff during load game

  /* Get list size */
  for (nItem = 1; nItem <= ((ListGame *) gameList.tailPred)->number; nItem++){
    if(lg->position >= 0) { // selected?
      LoadGame(f, nItem, "", TRUE);
      SaveGamePGN2(g); // leaves g open
      cnt++; DoEvents();
    }
    lg = (ListGame *) lg->node.succ;
  }

  fclose(g);
  creatingBook = FALSE;

  return cnt;
}

void CreateBookEvent ()
{
  ListGame * lg = (ListGame *) gameList.head;
  FILE *f, *g;
  int nItem;
  static int secondTime = FALSE;

  if( !(f = GameFile()) || ((ListGame *) gameList.tailPred)->number <= 0 ) {
    DisplayError(_("Game list not loaded or empty"), 0);
    return;
  }

  if(!secondTime && (g = fopen(appData.polyglotBook, "r"))) {
    fclose(g);
    secondTime++;
    DisplayNote(_("Book file exists! Try again for overwrite."));
    return;
  }

  creatingBook = TRUE;
  secondTime = FALSE;

  /* Get list size */
  for (nItem = 1; nItem <= ((ListGame *) gameList.tailPred)->number; nItem++){
    if(lg->position >= 0) {
      LoadGame(f, nItem, "", TRUE);
      AddGameToBook(TRUE);
      DoEvents();
    }
    lg = (ListGame *) lg->node.succ;
  }

  creatingBook = FALSE;
  FlushBook();
}

void BookEvent ()
{
  if (appData.noChessProgram) return;
  switch (gameMode) {
    case MachinePlaysWhite:
      if (WhiteOnMove(forwardMostMove)) {
        DisplayError(_("Wait until your turn."), 0);
        return;
      }
      break;
    case BeginningOfGame:
    case MachinePlaysBlack:
      if (!WhiteOnMove(forwardMostMove)) {
        DisplayError(_("Wait until your turn."), 0);
        return;
      }
      break;
    case EditPosition:
      EditPositionDone(TRUE);
      break;
    case TwoMachinesPlay:
      return;
    default:
      break;
  }
  SendToProgram("bk\n", &first);
  bookOutput[0] = NULLCHAR;
  bookRequested = TRUE;
}

void AboutGameEvent ()
{
  char *tags = PGNTags(&gameInfo);
  TagsPopUp(tags, CmailMsg());
  free(tags);
}

/* end button procedures */

void PrintPosition (FILE *fp, int move)
{
  int i, j;

  for (i = BOARD_HEIGHT - 1; i >= 0; i--) {
    for (j = BOARD_LEFT; j < BOARD_RGHT; j++) {
      char c = PieceToChar(boards[move][i][j]);
      fputc(c == '?' ? '.' : c, fp);
      fputc(j == BOARD_RGHT - 1 ? '\n' : ' ', fp);
    }
  }
  if ((gameMode == EditPosition) ? !blackPlaysFirst : (move % 2 == 0))
    fprintf(fp, "white to play\n");
  else
    fprintf(fp, "black to play\n");
}

void PrintOpponents (FILE *fp)
{
  if (gameInfo.white != NULL) {
    fprintf(fp, "\t%s vs. %s\n", gameInfo.white, gameInfo.black);
  } else {
    fprintf(fp, "\n");
  }
}

/* Find last component of program's own name, using some heuristics */
void TidyProgramName (char *prog, char *host, char buf[MSG_SIZ])
{
  char *p, *q, c;
  int local = (strcmp(host, "localhost") == 0);
  while (!local && (p = strchr(prog, ';')) != NULL) {
    p++;
    while (*p == ' ') p++;
    prog = p;
  }
  if (*prog == '"' || *prog == '\'') {
    q = strchr(prog + 1, *prog);
  } else {
    q = strchr(prog, ' ');
  }
  if (q == NULL) q = prog + strlen(prog);
  p = q;
  while (p >= prog && *p != '/' && *p != '\\') p--;
  p++;
  if(p == prog && *p == '"') p++;
  c = *q; *q = 0;
  if (q - p >= 4 && StrCaseCmp(q - 4, ".exe") == 0) *q = c, q -= 4; else *q = c;
  memcpy(buf, p, q - p);
  buf[q - p] = NULLCHAR;
  if (!local) {
    strcat(buf, "@");
    strcat(buf, host);
  }
}

char * TimeControlTagValue ()
{
  char buf[MSG_SIZ];
  if (!appData.clockMode) {
    safeStrCpy(buf, "-", sizeof(buf)/sizeof(buf[0]));
  } else if (movesPerSession > 0) {
    snprintf(buf, MSG_SIZ, "%d/%ld", movesPerSession, timeControl/1000);
  } else if (timeIncrement == 0) {
    snprintf(buf, MSG_SIZ, "%ld", timeControl/1000);
  } else {
    snprintf(buf, MSG_SIZ, "%ld+%ld", timeControl/1000, timeIncrement/1000);
  }
  return StrSave(buf);
}

void SetGameInfo ()
{
  /* This routine is used only for certain modes */
  VariantClass v = gameInfo.variant;
  ChessMove r = GameUnfinished;
  char *p = NULL;

  if(keepInfo) return;

  if(gameMode == EditGame) { // [HGM] vari: do not erase result on EditGame
    r = gameInfo.result;
    p = gameInfo.resultDetails;
    gameInfo.resultDetails = NULL;
  }
  ClearGameInfo(&gameInfo);
  gameInfo.variant = v;

  switch (gameMode) {
    case MachinePlaysWhite:
      gameInfo.event = StrSave( appData.pgnEventHeader );
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      gameInfo.round = StrSave("-");
      gameInfo.white = StrSave(first.tidy);
      gameInfo.black = StrSave(UserName());
      gameInfo.timeControl = TimeControlTagValue();
      break;

    case MachinePlaysBlack:
      gameInfo.event = StrSave( appData.pgnEventHeader );
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      gameInfo.round = StrSave("-");
      gameInfo.white = StrSave(UserName());
      gameInfo.black = StrSave(first.tidy);
      gameInfo.timeControl = TimeControlTagValue();
      break;

    case TwoMachinesPlay:
      gameInfo.event = StrSave( appData.pgnEventHeader );
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      if (roundNr > 0) {
        char buf[MSG_SIZ];
        snprintf(buf, MSG_SIZ, "%d", roundNr);
        gameInfo.round = StrSave(buf);
      } else {
        gameInfo.round = StrSave("-");
      }
      if (first.twoMachinesColor[0] == 'w') {
        gameInfo.white = StrSave(appData.pgnName[0][0] ? appData.pgnName[0] : first.tidy);
        gameInfo.black = StrSave(appData.pgnName[1][0] ? appData.pgnName[1] : second.tidy);
      } else {
        gameInfo.white = StrSave(appData.pgnName[1][0] ? appData.pgnName[1] : second.tidy);
        gameInfo.black = StrSave(appData.pgnName[0][0] ? appData.pgnName[0] : first.tidy);
      }
      gameInfo.timeControl = TimeControlTagValue();
      break;

    case EditGame:
      gameInfo.event = StrSave("Edited game");
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      gameInfo.round = StrSave("-");
      gameInfo.white = StrSave("-");
      gameInfo.black = StrSave("-");
      gameInfo.result = r;
      gameInfo.resultDetails = p;
      break;

    case EditPosition:
      gameInfo.event = StrSave("Edited position");
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      gameInfo.round = StrSave("-");
      gameInfo.white = StrSave("-");
      gameInfo.black = StrSave("-");
      break;

    case IcsPlayingWhite:
    case IcsPlayingBlack:
    case IcsObserving:
    case IcsExamining:
      break;

    case PlayFromGameFile:
      gameInfo.event = StrSave("Game from non-PGN file");
      gameInfo.site = StrSave(HostName());
      gameInfo.date = PGNDate();
      gameInfo.round = StrSave("-");
      gameInfo.white = StrSave("?");
      gameInfo.black = StrSave("?");
      break;

    default:
      break;
  }
}

void ReplaceComment (int index, char *text)
{
  int len;
  char *p;
  float score;

  if(index && sscanf(text, "%f/%d", &score, &len) == 2 &&
      pvInfoList[index-1].depth == len &&
      fabs(pvInfoList[index-1].score - score*100.) < 0.5 &&
      (p = strchr(text, '\n'))) text = p; // [HGM] strip off first line with PV info, if any
  while (*text == '\n') text++;
  len = strlen(text);
  while (len > 0 && text[len - 1] == '\n') len--;

  if (commentList[index] != NULL)
    free(commentList[index]);

  if (len == 0) {
    commentList[index] = NULL;
    return;
  }
  if( *text == '{' && strchr(text, '}') || // [HGM] braces: if certainy malformed, put braces
      *text == '[' && strchr(text, ']') || // otherwise hope the user knows what he is doing
      *text == '(' && strchr(text, ')')) { // (perhaps check if this parses as comment-only?)
    commentList[index] = (char *) malloc(len + 2);
    strncpy(commentList[index], text, len);
    commentList[index][len] = '\n';
    commentList[index][len + 1] = NULLCHAR;
  } else {
    // [HGM] braces: if text does not start with known OK delimiter, put braces around it.
    char *p;
    commentList[index] = (char *) malloc(len + 7);
    safeStrCpy(commentList[index], "{\n", 3);
    safeStrCpy(commentList[index]+2, text, len+1);
    commentList[index][len+2] = NULLCHAR;
    while(p = strchr(commentList[index], '}')) *p = ')'; // kill all to make it one comment
    strcat(commentList[index], "\n}\n");
  }
}

void CrushCRs (char *text)
{
  char *p = text;
  char *q = text;
  char ch;

  do {
    ch = *p++;
    if (ch == '\r') continue;
    *q++ = ch;
  } while (ch != '\0');
}

void AppendComment (int index, char *text, Boolean addBraces)
  /* addBraces  tells if we should add {} */
{
  int oldlen, len;
  char *old;

  if(appData.debugMode) fprintf(debugFP, "Append: in='%s' %d\n", text, addBraces);
  if(addBraces == 3) addBraces = 0; else // force appending literally
    text = GetInfoFromComment( index, text ); /* [HGM] PV time: strip PV info from comment */

  CrushCRs(text);
  while (*text == '\n') text++;
  len = strlen(text);
  while (len > 0 && text[len - 1] == '\n') len--;
  text[len] = NULLCHAR;

  if (len == 0) return;

  if (commentList[index] != NULL) {
    Boolean addClosingBrace = addBraces;
    old = commentList[index];
    oldlen = strlen(old);
    while(commentList[index][oldlen-1] ==  '\n')
      commentList[index][--oldlen] = NULLCHAR;
    commentList[index] = (char *) malloc(oldlen + len + 6); // might waste 4
    safeStrCpy(commentList[index], old, oldlen + len + 6);
    free(old);
    // [HGM] braces: join "{A\n}\n" + "{\nB}" as "{A\nB\n}"
    if(commentList[index][oldlen-1] == '}' && (text[0] == '{' || addBraces == TRUE)) {
      if(addBraces == TRUE) addBraces = FALSE; else { text++; len--; }
      while (*text == '\n') { text++; len--; }
      commentList[index][--oldlen] = NULLCHAR;
    }
    if(addBraces) strcat(commentList[index], addBraces == 2 ? "\n(" : "\n{\n");
    else          strcat(commentList[index], "\n");
    strcat(commentList[index], text);
    if(addClosingBrace) strcat(commentList[index], addClosingBrace == 2 ? ")\n" : "\n}\n");
    else          strcat(commentList[index], "\n");
  } else {
    commentList[index] = (char *) malloc(len + 6); // perhaps wastes 4...
    if(addBraces)
      safeStrCpy(commentList[index], addBraces == 2 ? "(" : "{\n", 3);
    else commentList[index][0] = NULLCHAR;
    strcat(commentList[index], text);
    strcat(commentList[index], addBraces == 2 ? ")\n" : "\n");
    if(addBraces == TRUE) strcat(commentList[index], "}\n");
  }
}

static char * FindStr (char * text, char * sub_text)
{
  char * result = strstr( text, sub_text );

  if( result != NULL ) {
    result += strlen( sub_text );
  }

  return result;
}

/* [AS] Try to extract PV info from PGN comment */
/* [HGM] PV time: and then remove it, to prevent it appearing twice */
char * GetInfoFromComment (int index, char * text)
{
  char * sep = text, *p;

  if( text != NULL && index > 0 ) {
    int score = 0;
    int depth = 0;
    int time = -1, sec = 0, deci;
    char * s_eval = FindStr( text, "[%eval " );
    char * s_emt = FindStr( text, "[%emt " );
#if 0
    // if( s_eval != NULL || s_emt != NULL )
#else
    if(0) { // [HGM] this code is not finished, and could actually be detrimental
#endif
      /* New style */
      char delim;

      if( s_eval != NULL ) {
        if( sscanf( s_eval, "%d,%d%c", &score, &depth, &delim ) != 3 ) {
          return text;
        }

        if( delim != ']' ) {
          return text;
        }
      }

      if( s_emt != NULL ) {
      }
      return text;
    }
    else {
      /* We expect something like: [+|-]nnn.nn/dd */
      int score_lo = 0;

      if(*text != '{') return text; // [HGM] braces: must be normal comment

      sep = strchr( text, '/' );
      if( sep == NULL || sep < (text+4) ) {
        return text;
      }

      p = text;
      if(!strncmp(p+1, "final score ", 12)) p += 12, index++; else
        if(p[1] == '(') { // comment starts with PV
          p = strchr(p, ')'); // locate end of PV
          if(p == NULL || sep < p+5) return text;
          // at this point we have something like "{(.*) +0.23/6 ..."
          p = text; while(*++p != ')') p[-1] = *p; p[-1] = ')';
          *p = '\n'; while(*p == ' ' || *p == '\n') p++; *--p = '{';
          // we now moved the brace to behind the PV: "(.*) {+0.23/6 ..."
        }
      time = -1; sec = -1; deci = -1;
      if( sscanf( p+1, "%d.%d/%d %d:%d", &score, &score_lo, &depth, &time, &sec ) != 5 &&
          sscanf( p+1, "%d.%d/%d %d.%d", &score, &score_lo, &depth, &time, &deci ) != 5 &&
          sscanf( p+1, "%d.%d/%d %d", &score, &score_lo, &depth, &time ) != 4 &&
          sscanf( p+1, "%d.%d/%d", &score, &score_lo, &depth ) != 3   ) {
        return text;
      }

      if( score_lo < 0 || score_lo >= 100 ) {
        return text;
      }

      if(sec >= 0) time = 600*time + 10*sec; else
        if(deci >= 0) time = 10*time + deci; else time *= 10; // deci-sec

      score = score > 0 || !score & p[1] != '-' ? score*100 + score_lo : score*100 - score_lo;

      /* [HGM] PV time: now locate end of PV info */
      while( *++sep >= '0' && *sep <= '9'); // strip depth
      if(time >= 0)
        while( *++sep >= '0' && *sep <= '9' || *sep == '\n'); // strip time
      if(sec >= 0)
        while( *++sep >= '0' && *sep <= '9'); // strip seconds
      if(deci >= 0)
        while( *++sep >= '0' && *sep <= '9'); // strip fractional seconds
      while(*sep == ' ' || *sep == '\n' || *sep == '\r') sep++;
    }

    if( depth <= 0 ) {
      return text;
    }

    if( time < 0 ) {
      time = -1;
    }

    pvInfoList[index-1].depth = depth;
    pvInfoList[index-1].score = score;
    pvInfoList[index-1].time  = 10*time; // centi-sec
    if(*sep == '}') *sep = 0; else *--sep = '{';
    if(p != text) {
      while(*p++ = *sep++)
        ;
      sep = text;
    } // squeeze out space between PV and comment, and return both
  }
  return sep;
}

void SendToProgram (char *message, ChessProgramState *cps)
{
  int count, outCount, error;
  char buf[MSG_SIZ];

  if (cps->pr == NoProc) return;
  Attention(cps);

  if (appData.debugMode) {
    TimeMark now;
    GetTimeMark(&now);
    fprintf(debugFP, "%ld >%-6s: %s",
        SubtractTimeMarks(&now, &programStartTime),
        cps->which, message);
    if(serverFP)
      fprintf(serverFP, "%ld >%-6s: %s",
          SubtractTimeMarks(&now, &programStartTime),
          cps->which, message), fflush(serverFP);
  }

  count = strlen(message);
  outCount = OutputToProcess(cps->pr, message, count, &error);
  if (outCount < count && !exiting
      && !endingGame) { /* [HGM] crash: to not hang GameEnds() writing to deceased engines */
    if(!cps->initDone) return; // [HGM] should not generate fatal error during engine load
    snprintf(buf, MSG_SIZ, _("Error writing to %s chess program"), _(cps->which));
    if(gameInfo.resultDetails==NULL) { /* [HGM] crash: if game in progress, give reason for abort */
      if((signed char)boards[forwardMostMove][EP_STATUS] <= EP_DRAWS) {
        snprintf(buf, MSG_SIZ, _("%s program exits in draw position (%s)"), _(cps->which), cps->program);
        if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; GameEnds(GameIsDrawn, buf, GE_XBOARD); return; }
        gameInfo.result = GameIsDrawn; /* [HGM] accept exit as draw claim */
      } else {
        ChessMove res = cps->twoMachinesColor[0]=='w' ? BlackWins : WhiteWins;
        if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; GameEnds(res, buf, GE_XBOARD); return; }
        gameInfo.result = res;
      }
      gameInfo.resultDetails = StrSave(buf);
    }
    if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; return; }
    if(!cps->userError || !appData.popupExitMessage) DisplayFatalError(buf, error, 1); else errorExitStatus = 1;
  }
}

void ReceiveFromProgram (InputSourceRef isr, VOIDSTAR closure, char *message, int count, int error)
{
  char *end_str;
  char buf[MSG_SIZ];
  ChessProgramState *cps = (ChessProgramState *)closure;

  if (isr != cps->isr) return; /* Killed intentionally */
  if (count <= 0) {
    if (count == 0) {
      RemoveInputSource(cps->isr);
      snprintf(buf, MSG_SIZ, _("Error: %s chess program (%s) exited unexpectedly"),
          _(cps->which), cps->program);
      if(LoadError(cps->userError ? NULL : buf, cps)) return; // [HGM] should not generate fatal error during engine load
      if(gameInfo.resultDetails==NULL) { /* [HGM] crash: if game in progress, give reason for abort */
        if((signed char)boards[forwardMostMove][EP_STATUS] <= EP_DRAWS) {
          snprintf(buf, MSG_SIZ, _("%s program exits in draw position (%s)"), _(cps->which), cps->program);
          if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; GameEnds(GameIsDrawn, buf, GE_XBOARD); return; }
          gameInfo.result = GameIsDrawn; /* [HGM] accept exit as draw claim */
        } else {
          ChessMove res = cps->twoMachinesColor[0]=='w' ? BlackWins : WhiteWins;
          if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; GameEnds(res, buf, GE_XBOARD); return; }
          gameInfo.result = res;
        }
        gameInfo.resultDetails = StrSave(buf);
      }
      if(matchMode && appData.tourneyFile[0]) { cps->pr = NoProc; return; }
      if(!cps->userError || !appData.popupExitMessage) DisplayFatalError(buf, 0, 1); else errorExitStatus = 1;
    } else {
      snprintf(buf, MSG_SIZ, _("Error reading from %s chess program (%s)"),
          _(cps->which), cps->program);
      RemoveInputSource(cps->isr);

      /* [AS] Program is misbehaving badly... kill it */
      if( count == -2 ) {
        DestroyChildProcess( cps->pr, 9 );
        cps->pr = NoProc;
      }

      if(!cps->userError || !appData.popupExitMessage) DisplayFatalError(buf, error, 1); else errorExitStatus = 1;
    }
    return;
  }

  if ((end_str = strchr(message, '\r')) != NULL)
    *end_str = NULLCHAR;
  if ((end_str = strchr(message, '\n')) != NULL)
    *end_str = NULLCHAR;

  if (appData.debugMode) {
    TimeMark now; int print = 1;
    char *quote = ""; char c; int i;

    if(appData.engineComments != 1) { /* [HGM] debug: decide if protocol-violating output is written */
      char start = message[0];
      if(start >='A' && start <= 'Z') start += 'a' - 'A'; // be tolerant to capitalizing
      if(sscanf(message, "%d%c%d%d%d", &i, &c, &i, &i, &i) != 5 &&
          sscanf(message, "move %c", &c)!=1  && sscanf(message, "offer%c", &c)!=1 &&
          sscanf(message, "resign%c", &c)!=1 && sscanf(message, "feature %c", &c)!=1 &&
          sscanf(message, "error %c", &c)!=1 && sscanf(message, "illegal %c", &c)!=1 &&
          sscanf(message, "tell%c", &c)!=1   && sscanf(message, "0-1 %c", &c)!=1 &&
          sscanf(message, "1-0 %c", &c)!=1   && sscanf(message, "1/2-1/2 %c", &c)!=1 &&
          sscanf(message, "setboard %c", &c)!=1   && sscanf(message, "setup %c", &c)!=1 &&
          sscanf(message, "hint: %c", &c)!=1 &&
          sscanf(message, "pong %c", &c)!=1   && start != '#')	{
        quote = appData.engineComments == 2 ? "# " : "### NON-COMPLIANT! ### ";
        print = (appData.engineComments >= 2);
      }
      message[0] = start; // restore original message
    }
    if(print) {
      GetTimeMark(&now);
      fprintf(debugFP, "%ld <%-6s: %s%s\n",
          SubtractTimeMarks(&now, &programStartTime), cps->which,
          quote,
          message);
      if(serverFP)
        fprintf(serverFP, "%ld <%-6s: %s%s\n",
            SubtractTimeMarks(&now, &programStartTime), cps->which,
            quote,
            message), fflush(serverFP);
    }
  }

  /* [DM] if icsEngineAnalyze is active we block all whisper and kibitz output, because nobody want to see this */
  if (appData.icsEngineAnalyze) {
    if (strstr(message, "whisper") != NULL ||
        strstr(message, "kibitz") != NULL ||
        strstr(message, "tellics") != NULL) return;
  }

  HandleMachineMove(message, cps);
}


void SendTimeControl (ChessProgramState *cps, int mps, long tc, int inc, int sd, int st)
{
  char buf[MSG_SIZ];
  int seconds;

  if( timeControl_2 > 0 ) {
    if( (gameMode == MachinePlaysBlack) || (gameMode == TwoMachinesPlay && cps->twoMachinesColor[0] == 'b') ) {
      tc = timeControl_2;
    }
  }
  tc  /= cps->timeOdds; /* [HGM] time odds: apply before telling engine */
  inc /= cps->timeOdds;
  st  /= cps->timeOdds;

  seconds = (tc / 1000) % 60; /* [HGM] displaced to after applying odds */

  if (st > 0) {
    /* Set exact time per move, normally using st command */
    if (cps->stKludge) {
      /* GNU Chess 4 has no st command; uses level in a nonstandard way */
      seconds = st % 60;
      if (seconds == 0) {
        snprintf(buf, MSG_SIZ, "level 1 %d\n", st/60);
      } else {
        snprintf(buf, MSG_SIZ, "level 1 %d:%02d\n", st/60, seconds);
      }
    } else {
      snprintf(buf, MSG_SIZ, "st %d\n", st);
    }
  } else {
    /* Set conventional or incremental time control, using level command */
    if (seconds == 0) {
      /* Note old gnuchess bug -- minutes:seconds used to not work.
         Fixed in later versions, but still avoid :seconds
         when seconds is 0. */
      snprintf(buf, MSG_SIZ, "level %d %ld %g\n", mps, tc/60000, inc/1000.);
    } else {
      snprintf(buf, MSG_SIZ, "level %d %ld:%02d %g\n", mps, tc/60000,
          seconds, inc/1000.);
    }
  }
  SendToProgram(buf, cps);

  /* Orthoganally (except for GNU Chess 4), limit time to st seconds */
  /* Orthogonally, limit search to given depth */
  if (sd > 0) {
    if (cps->sdKludge) {
      snprintf(buf, MSG_SIZ, "depth\n%d\n", sd);
    } else {
      snprintf(buf, MSG_SIZ, "sd %d\n", sd);
    }
    SendToProgram(buf, cps);
  }

  if(cps->nps >= 0) { /* [HGM] nps */
    if(cps->supportsNPS == FALSE)
      cps->nps = -1; // don't use if engine explicitly says not supported!
    else {
      snprintf(buf, MSG_SIZ, "nps %d\n", cps->nps);
      SendToProgram(buf, cps);
    }
  }
}

ChessProgramState * WhitePlayer ()
  /* [HGM] return pointer to 'first' or 'second', depending on who plays white */
{
  if(gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'b' ||
      gameMode == BeginningOfGame || gameMode == MachinePlaysBlack)
    return &second;
  return &first;
}

void SendTimeRemaining (ChessProgramState *cps, int machineWhite)
{
  char message[MSG_SIZ];
  long time, otime;

  /* Note: this routine must be called when the clocks are stopped
     or when they have *just* been set or switched; otherwise
     it will be off by the time since the current tick started.
     */
  if (machineWhite) {
    time = whiteTimeRemaining / 10;
    otime = blackTimeRemaining / 10;
  } else {
    time = blackTimeRemaining / 10;
    otime = whiteTimeRemaining / 10;
  }
  /* [HGM] translate opponent's time by time-odds factor */
  otime = (otime * cps->other->timeOdds) / cps->timeOdds;

  if (time <= 0) time = 1;
  if (otime <= 0) otime = 1;

  snprintf(message, MSG_SIZ, "time %ld\n", time);
  SendToProgram(message, cps);

  snprintf(message, MSG_SIZ, "otim %ld\n", otime);
  SendToProgram(message, cps);
}

char * EngineDefinedVariant (ChessProgramState *cps, int n)
{   // return name of n-th unknown variant that engine supports
  static char buf[MSG_SIZ];
  char *p, *s = cps->variants;
  if(!s) return NULL;
  do { // parse string from variants feature
    VariantClass v;
    p = strchr(s, ',');
    if(p) *p = NULLCHAR;
    v = StringToVariant(s);
    if(v == VariantNormal && strcmp(s, "normal") && !strstr(s, "_normal")) v = VariantUnknown; // garbage is recognized as normal
    if(v == VariantUnknown) { // non-standard variant in list of engine-supported variants
      if(!strcmp(s, "tenjiku") || !strcmp(s, "dai") || !strcmp(s, "dada") || // ignore Alien-Edition variants
          !strcmp(s, "maka") || !strcmp(s, "tai") || !strcmp(s, "kyoku") ||
          !strcmp(s, "checkers") || !strcmp(s, "go") || !strcmp(s, "reversi") ||
          !strcmp(s, "dark") || !strcmp(s, "alien") || !strcmp(s, "multi") || !strcmp(s, "amazons") ) n++;
      if(--n < 0) safeStrCpy(buf, s, MSG_SIZ);
    }
    if(p) *p++ = ',';
    if(n < 0) return buf;
  } while(s = p);
  return NULL;
}

int BoolFeature (char **p, char *name, int *loc, ChessProgramState *cps)
{
  char buf[MSG_SIZ];
  int len = strlen(name);
  int val;

  if (strncmp((*p), name, len) == 0 && (*p)[len] == '=') {
    (*p) += len + 1;
    sscanf(*p, "%d", &val);
    *loc = (val != 0);
    while (**p && **p != ' ')
      (*p)++;
    snprintf(buf, MSG_SIZ, "accepted %s\n", name);
    SendToProgram(buf, cps);
    return TRUE;
  }
  return FALSE;
}

int IntFeature (char **p, char *name, int *loc, ChessProgramState *cps)
{
  char buf[MSG_SIZ];
  int len = strlen(name);
  if (strncmp((*p), name, len) == 0 && (*p)[len] == '=') {
    (*p) += len + 1;
    sscanf(*p, "%d", loc);
    while (**p && **p != ' ') (*p)++;
    snprintf(buf, MSG_SIZ, "accepted %s\n", name);
    SendToProgram(buf, cps);
    return TRUE;
  }
  return FALSE;
}

int StringFeature (char **p, char *name, char **loc, ChessProgramState *cps)
{
  char buf[MSG_SIZ];
  int len = strlen(name);
  if (strncmp((*p), name, len) == 0
      && (*p)[len] == '=' && (*p)[len+1] == '\"') {
    (*p) += len + 2;
    ASSIGN(*loc, *p); // kludge alert: assign rest of line just to be sure allocation is large enough so that sscanf below always fits
    sscanf(*p, "%[^\"]", *loc);
    while (**p && **p != '\"') (*p)++;
    if (**p == '\"') (*p)++;
    snprintf(buf, MSG_SIZ, "accepted %s\n", name);
    SendToProgram(buf, cps);
    return TRUE;
  }
  return FALSE;
}

int ParseOption (Option *opt, ChessProgramState *cps)
  // [HGM] options: process the string that defines an engine option, and determine
  // name, type, default value, and allowed value range
{
  char *p, *q, buf[MSG_SIZ];
  int n, min = (-1)<<31, max = 1<<31, def;

  opt->target = &opt->value;   // OK for spin/slider and checkbox
  if(p = strstr(opt->name, " -spin ")) {
    if((n = sscanf(p, " -spin %d %d %d", &def, &min, &max)) < 3 ) return FALSE;
    if(max < min) max = min; // enforce consistency
    if(def < min) def = min;
    if(def > max) def = max;
    opt->value = def;
    opt->min = min;
    opt->max = max;
    opt->type = Spin;
  } else if((p = strstr(opt->name, " -slider "))) {
    // for now -slider is a synonym for -spin, to already provide compatibility with future polyglots
    if((n = sscanf(p, " -slider %d %d %d", &def, &min, &max)) < 3 ) return FALSE;
    if(max < min) max = min; // enforce consistency
    if(def < min) def = min;
    if(def > max) def = max;
    opt->value = def;
    opt->min = min;
    opt->max = max;
    opt->type = Spin; // Slider;
  } else if((p = strstr(opt->name, " -string "))) {
    opt->textValue = p+9;
    opt->type = TextBox;
    opt->target = &opt->textValue;
  } else if((p = strstr(opt->name, " -file "))) {
    // for now -file is a synonym for -string, to already provide compatibility with future polyglots
    opt->target = opt->textValue = p+7;
    opt->type = FileName; // FileName;
    opt->target = &opt->textValue;
  } else if((p = strstr(opt->name, " -path "))) {
    // for now -file is a synonym for -string, to already provide compatibility with future polyglots
    opt->target = opt->textValue = p+7;
    opt->type = PathName; // PathName;
    opt->target = &opt->textValue;
  } else if(p = strstr(opt->name, " -check ")) {
    if(sscanf(p, " -check %d", &def) < 1) return FALSE;
    opt->value = (def != 0);
    opt->type = CheckBox;
  } else if(p = strstr(opt->name,	" -combo ")) {
    opt->textValue = (char*) (opt->choice = &cps->comboList[cps->comboCnt]); // cheat with pointer type
    cps->comboList[cps->comboCnt++] = q = p+8; // holds possible choices
    if(*q == '*') cps->comboList[cps->comboCnt-1]++;
    opt->value = n = 0;
    while(q = StrStr(q, " /// ")) {
      n++; *q = 0;    // count choices, and null-terminate each of them
      q += 5;
      if(*q == '*') { // remember default, which is marked with * prefix
        q++;
        opt->value = n;
      }
      cps->comboList[cps->comboCnt++] = q;
    }
    cps->comboList[cps->comboCnt++] = NULL;
    opt->max = n + 1;
    opt->type = ComboBox;
  } else if(p = strstr(opt->name, " -button")) {
    opt->type = Button;
  } else if(p = strstr(opt->name, " -save")) {
    opt->type = SaveButton;
  } else return FALSE;
  *p = 0; // terminate option name
  // now look if the command-line options define a setting for this engine option.
  if(cps->optionSettings && cps->optionSettings[0])
    p = strstr(cps->optionSettings, opt->name); else p = NULL;
  if(p && (p == cps->optionSettings || p[-1] == ',')) {
    snprintf(buf, MSG_SIZ, "option %s", p);
    if(p = strstr(buf, ",")) *p = 0;
    if(q = strchr(buf, '=')) switch(opt->type) {
      case ComboBox:
        for(n=0; n<opt->max; n++)
          if(!strcmp(((char**)opt->textValue)[n], q+1)) opt->value = n;
        break;
      case TextBox:
        safeStrCpy(opt->textValue, q+1, MSG_SIZ - (opt->textValue - opt->name));
        break;
      case Spin:
      case CheckBox:
        opt->value = atoi(q+1);
      default:
        break;
    }
    strcat(buf, "\n");
    SendToProgram(buf, cps);
  }
  return TRUE;
}

void FeatureDone (ChessProgramState *cps, int val)
{
  DelayedEventCallback cb = GetDelayedEvent();
  if ((cb == InitBackEnd3 && cps == &first) ||
      (cb == SettingsMenuIfReady && cps == &second) ||
      (cb == LoadEngine) ||
      (cb == TwoMachinesEventIfReady)) {
    CancelDelayedEvent();
    ScheduleDelayedEvent(cb, val ? 1 : 3600000);
  } else if(!val && !cps->reload) ClearOptions(cps); // let 'spurious' done=0 clear engine's option list
  cps->initDone = val;
  if(val) cps->reload = FALSE,  RefreshSettingsDialog(cps, val);
}

/* Parse feature command from engine */
void ParseFeatures (char *args, ChessProgramState *cps)
{
  char *p = args;
  char *q = NULL;
  int val;
  char buf[MSG_SIZ];

  for (;;) {
    while (*p == ' ') p++;
    if (*p == NULLCHAR) return;

    if (BoolFeature(&p, "setboard", &cps->useSetboard, cps)) continue;
    if (BoolFeature(&p, "xedit", &cps->extendedEdit, cps)) continue;
    if (BoolFeature(&p, "time", &cps->sendTime, cps)) continue;
    if (BoolFeature(&p, "draw", &cps->sendDrawOffers, cps)) continue;
    if (BoolFeature(&p, "sigint", &cps->useSigint, cps)) continue;
    if (BoolFeature(&p, "sigterm", &cps->useSigterm, cps)) continue;
    if (BoolFeature(&p, "reuse", &val, cps)) {
      /* Engine can disable reuse, but can't enable it if user said no */
      if (!val) cps->reuse = FALSE;
      continue;
    }
    if (BoolFeature(&p, "analyze", &cps->analysisSupport, cps)) continue;
    if (StringFeature(&p, "myname", &cps->tidy, cps)) {
      if (gameMode == TwoMachinesPlay) {
        DisplayTwoMachinesTitle();
      } else {
        DisplayTitle("");
      }
      continue;
    }
    if (StringFeature(&p, "variants", &cps->variants, cps)) continue;
    if (BoolFeature(&p, "san", &cps->useSAN, cps)) continue;
    if (BoolFeature(&p, "ping", &cps->usePing, cps)) continue;
    if (BoolFeature(&p, "playother", &cps->usePlayother, cps)) continue;
    if (BoolFeature(&p, "colors", &cps->useColors, cps)) continue;
    if (BoolFeature(&p, "usermove", &cps->useUsermove, cps)) continue;
    if (BoolFeature(&p, "exclude", &cps->excludeMoves, cps)) continue;
    if (BoolFeature(&p, "ics", &cps->sendICS, cps)) continue;
    if (BoolFeature(&p, "name", &cps->sendName, cps)) continue;
    if (BoolFeature(&p, "pause", &cps->pause, cps)) continue; // [HGM] pause
    if (IntFeature(&p, "done", &val, cps)) {
      FeatureDone(cps, val);
      continue;
    }
    /* Added by Tord: */
    if (BoolFeature(&p, "fen960", &cps->useFEN960, cps)) continue;
    if (BoolFeature(&p, "oocastle", &cps->useOOCastle, cps)) continue;
    /* End of additions by Tord */

    /* [HGM] added features: */
    if (BoolFeature(&p, "highlight", &cps->highlight, cps)) continue;
    if (BoolFeature(&p, "debug", &cps->debug, cps)) continue;
    if (BoolFeature(&p, "nps", &cps->supportsNPS, cps)) continue;
    if (IntFeature(&p, "level", &cps->maxNrOfSessions, cps)) continue;
    if (BoolFeature(&p, "memory", &cps->memSize, cps)) continue;
    if (BoolFeature(&p, "smp", &cps->maxCores, cps)) continue;
    if (StringFeature(&p, "egt", &cps->egtFormats, cps)) continue;
    if (StringFeature(&p, "option", &q, cps)) { // read to freshly allocated temp buffer first
      if(cps->reload) { FREE(q); q = NULL; continue; } // we are reloading because of xreuse
      FREE(cps->option[cps->nrOptions].name);
      cps->option[cps->nrOptions].name = q; q = NULL;
      if(!ParseOption(&(cps->option[cps->nrOptions++]), cps)) { // [HGM] options: add option feature
        snprintf(buf, MSG_SIZ, "rejected option %s\n", cps->option[--cps->nrOptions].name);
        SendToProgram(buf, cps);
        continue;
      }
      if(cps->nrOptions >= MAX_OPTIONS) {
        cps->nrOptions--;
        snprintf(buf, MSG_SIZ, _("%s engine has too many options\n"), _(cps->which));
        DisplayError(buf, 0);
      }
      continue;
    }
    /* End of additions by HGM */

    /* unknown feature: complain and skip */
    q = p;
    while (*q && *q != '=') q++;
    snprintf(buf, MSG_SIZ,"rejected %.*s\n", (int)(q-p), p);
    SendToProgram(buf, cps);
    p = q;
    if (*p == '=') {
      p++;
      if (*p == '\"') {
        p++;
        while (*p && *p != '\"') p++;
        if (*p == '\"') p++;
      } else {
        while (*p && *p != ' ') p++;
      }
    }
  }

}

void PeriodicUpdatesEvent (int newState)
{
  if (newState == appData.periodicUpdates)
    return;

  appData.periodicUpdates=newState;

  /* Display type changes, so update it now */
  //    DisplayAnalysis();

  /* Get the ball rolling again... */
  if (newState) {
    AnalysisPeriodicEvent(1);
    StartAnalysisClock();
  }
}

void PonderNextMoveEvent (int newState)
{
  if (newState == appData.ponderNextMove) return;
  if (gameMode == EditPosition) EditPositionDone(TRUE);
  if (newState) {
    SendToProgram("hard\n", &first);
    if (gameMode == TwoMachinesPlay) {
      SendToProgram("hard\n", &second);
    }
  } else {
    SendToProgram("easy\n", &first);
    thinkOutput[0] = NULLCHAR;
    if (gameMode == TwoMachinesPlay) {
      SendToProgram("easy\n", &second);
    }
  }
  appData.ponderNextMove = newState;
}

void NewSettingEvent (int option, int *feature, char *command, int value)
{
  char buf[MSG_SIZ];

  if (gameMode == EditPosition) EditPositionDone(TRUE);
  snprintf(buf, MSG_SIZ,"%s%s %d\n", (option ? "option ": ""), command, value);
  if(feature == NULL || *feature) SendToProgram(buf, &first);
  if (gameMode == TwoMachinesPlay) {
    if(feature == NULL || feature[(int*)&second - (int*)&first]) SendToProgram(buf, &second);
  }
}

void ShowThinkingEvent ()
  // [HGM] thinking: this routine is now also called from "Options -> Engine..." popup
{
  static int oldState = 2; // kludge alert! Neither true nor fals, so first time oldState is always updated
  int newState = appData.showThinking
    // [HGM] thinking: other features now need thinking output as well
    || !appData.hideThinkingFromHuman || appData.adjudicateLossThreshold != 0 || EngineOutputIsUp();

  if (oldState == newState) return;
  oldState = newState;
  if (gameMode == EditPosition) EditPositionDone(TRUE);
  if (oldState) {
    SendToProgram("post\n", &first);
    if (gameMode == TwoMachinesPlay) {
      SendToProgram("post\n", &second);
    }
  } else {
    SendToProgram("nopost\n", &first);
    thinkOutput[0] = NULLCHAR;
    if (gameMode == TwoMachinesPlay) {
      SendToProgram("nopost\n", &second);
    }
  }
  //    appData.showThinking = newState; // [HGM] thinking: responsible option should already have be changed when calling this routine!
}

void AskQuestionEvent (char *title, char *question, char *replyPrefix, char *which)
{
  ProcRef pr = (which[0] == '1') ? first.pr : second.pr;
  if (pr == NoProc) return;
  AskQuestion(title, question, replyPrefix, pr);
}

void TypeInEvent (char firstChar)
{
  if ((gameMode == BeginningOfGame && !appData.icsActive) ||
      gameMode == MachinePlaysWhite || gameMode == MachinePlaysBlack ||
      gameMode == AnalyzeMode || gameMode == EditGame ||
      gameMode == EditPosition || gameMode == IcsExamining ||
      gameMode == IcsPlayingWhite || gameMode == IcsPlayingBlack ||
      isdigit(firstChar) && // [HGM] movenum: allow typing in of move nr in 'passive' modes
      ( gameMode == AnalyzeFile || gameMode == PlayFromGameFile ||
        gameMode == IcsObserving || gameMode == TwoMachinesPlay    ) ||
      gameMode == Training) PopUpMoveDialog(firstChar);
}

void TypeInDoneEvent (char *move)
{
  Board board;
  int n, fromX, fromY, toX, toY;
  char promoChar;
  ChessMove moveType;

  // [HGM] FENedit
  if(gameMode == EditPosition && ParseFEN(board, &n, move, TRUE) ) {
    EditPositionPasteFEN(move);
    return;
  }
  // [HGM] movenum: allow move number to be typed in any mode
  if(sscanf(move, "%d", &n) == 1 && n != 0 ) {
    ToNrEvent(2*n-1);
    return;
  }
  // undocumented kludge: allow command-line option to be typed in!
  // (potentially fatal, and does not implement the effect of the option.)
  // should only be used for options that are values on which future decisions will be made,
  // and definitely not on options that would be used during initialization.
  if(strstr(move, "!!! -") == move) {
    ParseArgsFromString(move+4);
    return;
  }

  if (gameMode != EditGame && currentMove != forwardMostMove &&
      gameMode != Training) {
    DisplayMoveError(_("Displayed move is not current"));
  } else {
    int ok = ParseOneMove(move, gameMode == EditPosition ? blackPlaysFirst : currentMove,
        &moveType, &fromX, &fromY, &toX, &toY, &promoChar);
    if(!ok && move[0] >= 'a') { move[0] += 'A' - 'a'; ok = 2; } // [HGM] try also capitalized
    if (ok==1 || ok && ParseOneMove(move, gameMode == EditPosition ? blackPlaysFirst : currentMove,
          &moveType, &fromX, &fromY, &toX, &toY, &promoChar)) {
      UserMoveEvent(fromX, fromY, toX, toY, promoChar);
    } else {
      DisplayMoveError(_("Could not parse move"));
    }
  }
}

void DisplayMove (int moveNumber)
{
  char message[MSG_SIZ];
  char res[MSG_SIZ];
  char cpThinkOutput[MSG_SIZ];

  if(appData.noGUI) return; // [HGM] fast: suppress display of moves

  if (moveNumber == forwardMostMove - 1 ||
      gameMode == AnalyzeMode || gameMode == AnalyzeFile) {

    safeStrCpy(cpThinkOutput, thinkOutput, sizeof(cpThinkOutput)/sizeof(cpThinkOutput[0]));

    if (strchr(cpThinkOutput, '\n')) {
      *strchr(cpThinkOutput, '\n') = NULLCHAR;
    }
  } else {
    *cpThinkOutput = NULLCHAR;
  }

  /* [AS] Hide thinking from human user */
  if( appData.hideThinkingFromHuman && gameMode != TwoMachinesPlay ) {
    *cpThinkOutput = NULLCHAR;
    if( thinkOutput[0] != NULLCHAR ) {
      int i;

      for( i=0; i<=hiddenThinkOutputState; i++ ) {
        cpThinkOutput[i] = '.';
      }
      cpThinkOutput[i] = NULLCHAR;
      hiddenThinkOutputState = (hiddenThinkOutputState + 1) % 3;
    }
  }

  if (moveNumber == forwardMostMove - 1 &&
      gameInfo.resultDetails != NULL) {
    if (gameInfo.resultDetails[0] == NULLCHAR) {
      snprintf(res, MSG_SIZ, " %s", PGNResult(gameInfo.result));
    } else {
      snprintf(res, MSG_SIZ, " {%s} %s",
          T_(gameInfo.resultDetails), PGNResult(gameInfo.result));
    }
  } else {
    res[0] = NULLCHAR;
  }

  if (moveNumber < 0 || parseList[moveNumber][0] == NULLCHAR) {
    DisplayMessage(res, cpThinkOutput);
  } else {
    snprintf(message, MSG_SIZ, "%d.%s%s%s", moveNumber / 2 + 1,
        WhiteOnMove(moveNumber) ? " " : ".. ",
        parseList[moveNumber], res);
    DisplayMessage(message, cpThinkOutput);
  }
}

void DisplayComment (int moveNumber, char *text)
{
  char title[MSG_SIZ];

  if (moveNumber < 0 || parseList[moveNumber][0] == NULLCHAR) {
    safeStrCpy(title, "Comment", sizeof(title)/sizeof(title[0]));
  } else {
    snprintf(title,MSG_SIZ, "Comment on %d.%s%s", moveNumber / 2 + 1,
        WhiteOnMove(moveNumber) ? " " : ".. ",
        parseList[moveNumber]);
  }
  if (text != NULL && (appData.autoDisplayComment || commentUp))
    CommentPopUp(title, text);
}

/* This routine sends a ^C interrupt to gnuchess, to awaken it if it
 * might be busy thinking or pondering.  It can be omitted if your
 * gnuchess is configured to stop thinking immediately on any user
 * input.  However, that gnuchess feature depends on the FIONREAD
 * ioctl, which does not work properly on some flavors of Unix.
 */
void Attention (ChessProgramState *cps)
{
#if ATTENTION
  if (!cps->useSigint) return;
  if (appData.noChessProgram || (cps->pr == NoProc)) return;
  switch (gameMode) {
    case MachinePlaysWhite:
    case MachinePlaysBlack:
    case TwoMachinesPlay:
    case IcsPlayingWhite:
    case IcsPlayingBlack:
    case AnalyzeMode:
    case AnalyzeFile:
      /* Skip if we know it isn't thinking */
      if (!cps->maybeThinking) return;
      if (appData.debugMode)
        fprintf(debugFP, "Interrupting %s\n", cps->which);
      InterruptChildProcess(cps->pr);
      cps->maybeThinking = FALSE;
      break;
    default:
      break;
  }
#endif /*ATTENTION*/
}

int CheckFlags ()
{
  if (whiteTimeRemaining <= 0) {
    if (!whiteFlag) {
      whiteFlag = TRUE;
      if (appData.icsActive) {
        if (appData.autoCallFlag &&
            gameMode == IcsPlayingBlack && !blackFlag) {
          SendToICS(ics_prefix);
          SendToICS("flag\n");
        }
      } else {
        if (blackFlag) {
          if(gameMode != TwoMachinesPlay) DisplayTitle(_("Both flags fell"));
        } else {
          if(gameMode != TwoMachinesPlay) DisplayTitle(_("White's flag fell"));
          if (appData.autoCallFlag) {
            GameEnds(BlackWins, "Black wins on time", GE_XBOARD);
            return TRUE;
          }
        }
      }
    }
  }
  if (blackTimeRemaining <= 0) {
    if (!blackFlag) {
      blackFlag = TRUE;
      if (appData.icsActive) {
        if (appData.autoCallFlag &&
            gameMode == IcsPlayingWhite && !whiteFlag) {
          SendToICS(ics_prefix);
          SendToICS("flag\n");
        }
      } else {
        if (whiteFlag) {
          if(gameMode != TwoMachinesPlay) DisplayTitle(_("Both flags fell"));
        } else {
          if(gameMode != TwoMachinesPlay) DisplayTitle(_("Black's flag fell"));
          if (appData.autoCallFlag) {
            GameEnds(WhiteWins, "White wins on time", GE_XBOARD);
            return TRUE;
          }
        }
      }
    }
  }
  return FALSE;
}

void CheckTimeControl ()
{
  if (!appData.clockMode || appData.icsActive || searchTime || // [HGM] st: no inc in st mode
      gameMode == PlayFromGameFile || forwardMostMove == 0) return;

  /*
   * add time to clocks when time control is achieved ([HGM] now also used for increment)
   */
  if ( !WhiteOnMove(forwardMostMove) ) {
    /* White made time control */
    lastWhite -= whiteTimeRemaining; // [HGM] contains start time, socalculate thinking time
    whiteTimeRemaining += GetTimeQuota((forwardMostMove-whiteStartMove-1)/2, lastWhite, whiteTC)
      /* [HGM] time odds: correct new time quota for time odds! */
      / WhitePlayer()->timeOdds;
    lastBlack = blackTimeRemaining; // [HGM] leave absolute time (after quota), so next switch we can us it to calculate thinking time
  } else {
    lastBlack -= blackTimeRemaining;
    /* Black made time control */
    blackTimeRemaining += GetTimeQuota((forwardMostMove-blackStartMove-1)/2, lastBlack, blackTC)
      / WhitePlayer()->other->timeOdds;
    lastWhite = whiteTimeRemaining;
  }
}

void DisplayBothClocks ()
{
  int wom = gameMode == EditPosition ?
    !blackPlaysFirst : WhiteOnMove(currentMove);
  DisplayWhiteClock(whiteTimeRemaining, wom);
  DisplayBlackClock(blackTimeRemaining, !wom);
}


/* Timekeeping seems to be a portability nightmare.  I think everyone
   has ftime(), but I'm really not sure, so I'm including some ifdefs
   to use other calls if you don't.  Clocks will be less accurate if
   you have neither ftime nor gettimeofday.
   */

/* VS 2008 requires the #include outside of the function */
#if !HAVE_GETTIMEOFDAY && HAVE_FTIME
#include <sys/timeb.h>
#endif

/* Get the current time as a TimeMark */
void GetTimeMark (TimeMark *tm)
{
#if HAVE_GETTIMEOFDAY

  struct timeval timeVal;
  struct timezone timeZone;

  gettimeofday(&timeVal, &timeZone);
  tm->sec = (long) timeVal.tv_sec;
  tm->ms = (int) (timeVal.tv_usec / 1000L);

#else /*!HAVE_GETTIMEOFDAY*/
#if HAVE_FTIME

  // include <sys/timeb.h> / moved to just above start of function
  struct timeb timeB;

  ftime(&timeB);
  tm->sec = (long) timeB.time;
  tm->ms = (int) timeB.millitm;

#else /*!HAVE_FTIME && !HAVE_GETTIMEOFDAY*/
  tm->sec = (long) time(NULL);
  tm->ms = 0;
#endif
#endif
}

/* Return the difference in milliseconds between two
   time marks.  We assume the difference will fit in a long!
   */
long SubtractTimeMarks (TimeMark *tm2, TimeMark *tm1)
{
  return 1000L*(tm2->sec - tm1->sec) +
    (long) (tm2->ms - tm1->ms);
}


/*
 * Code to manage the game clocks.
 *
 * In tournament play, black starts the clock and then white makes a move.
 * We give the human user a slight advantage if he is playing white---the
 * clocks don't run until he makes his first move, so it takes zero time.
 * Also, we don't account for network lag, so we could get out of sync
 * with GNU Chess's clock -- but then, referees are always right.
 */

static TimeMark tickStartTM;
static long intendedTickLength;

long NextTickLength (long timeRemaining)
{
  long nominalTickLength, nextTickLength;

  if (timeRemaining > 0L && timeRemaining <= 10000L)
    nominalTickLength = 100L;
  else
    nominalTickLength = 1000L;
  nextTickLength = timeRemaining % nominalTickLength;
  if (nextTickLength <= 0) nextTickLength += nominalTickLength;

  return nextTickLength;
}

/* Adjust clock one minute up or down */
void AdjustClock (Boolean which, int dir)
{
  if(appData.autoCallFlag) { DisplayError(_("Clock adjustment not allowed in auto-flag mode"), 0); return; }
  if(which) blackTimeRemaining += 60000*dir;
  else      whiteTimeRemaining += 60000*dir;
  DisplayBothClocks();
  adjustedClock = TRUE;
}

/* Stop clocks and reset to a fresh time control */
void ResetClocks ()
{
  (void) StopClockTimer();
  if (appData.icsActive) {
    whiteTimeRemaining = blackTimeRemaining = 0;
  } else if (searchTime) {
    whiteTimeRemaining = 1000*searchTime / WhitePlayer()->timeOdds;
    blackTimeRemaining = 1000*searchTime / WhitePlayer()->other->timeOdds;
  } else { /* [HGM] correct new time quote for time odds */
    whiteTC = blackTC = fullTimeControlString;
    whiteTimeRemaining = GetTimeQuota(-1, 0, whiteTC) / WhitePlayer()->timeOdds;
    blackTimeRemaining = GetTimeQuota(-1, 0, blackTC) / WhitePlayer()->other->timeOdds;
  }
  if (whiteFlag || blackFlag) {
    DisplayTitle("");
    whiteFlag = blackFlag = FALSE;
  }
  lastWhite = lastBlack = whiteStartMove = blackStartMove = 0;
  DisplayBothClocks();
  adjustedClock = FALSE;
}

#define FUDGE 25 /* 25ms = 1/40 sec; should be plenty even for 50 Hz clocks */

static int timeSuffix; // [HGM] This should realy be a passed parameter, but it has to pass through too many levels for my laziness...

/* Decrement running clock by amount of time that has passed */
void DecrementClocks ()
{
  long tRemaining;
  long lastTickLength, fudge;
  TimeMark now;

  if (!appData.clockMode) return;
  if (gameMode==AnalyzeMode || gameMode == AnalyzeFile) return;

  GetTimeMark(&now);

  lastTickLength = SubtractTimeMarks(&now, &tickStartTM);

  /* Fudge if we woke up a little too soon */
  fudge = intendedTickLength - lastTickLength;
  if (fudge < 0 || fudge > FUDGE) fudge = 0;

  if (WhiteOnMove(forwardMostMove)) {
    if(whiteNPS >= 0) lastTickLength = 0;
    tRemaining = whiteTimeRemaining -= lastTickLength;
    if( tRemaining < 0 && !appData.icsActive) {
      GetTimeQuota((forwardMostMove-whiteStartMove-1)/2, 0, whiteTC); // sets suddenDeath & nextSession;
      if(suddenDeath) { // [HGM] if we run out of a non-last incremental session, go to the next
        whiteStartMove = forwardMostMove; whiteTC = nextSession;
        lastWhite=  tRemaining = whiteTimeRemaining += GetTimeQuota(-1, 0, whiteTC);
      }
    }
    if(forwardMostMove && appData.moveTime) timeSuffix = timeRemaining[0][forwardMostMove-1] - tRemaining;
    DisplayWhiteClock(whiteTimeRemaining - fudge,
        WhiteOnMove(currentMove < forwardMostMove ? currentMove : forwardMostMove));
    timeSuffix = 0;
  } else {
    if(blackNPS >= 0) lastTickLength = 0;
    tRemaining = blackTimeRemaining -= lastTickLength;
    if( tRemaining < 0 && !appData.icsActive) { // [HGM] if we run out of a non-last incremental session, go to the next
      GetTimeQuota((forwardMostMove-blackStartMove-1)/2, 0, blackTC);
      if(suddenDeath) {
        blackStartMove = forwardMostMove;
        lastBlack =  tRemaining = blackTimeRemaining += GetTimeQuota(-1, 0, blackTC=nextSession);
      }
    }
    if(forwardMostMove && appData.moveTime) timeSuffix = timeRemaining[1][forwardMostMove-1] - tRemaining;
    DisplayBlackClock(blackTimeRemaining - fudge,
        !WhiteOnMove(currentMove < forwardMostMove ? currentMove : forwardMostMove));
    timeSuffix = 0;
  }
  if (CheckFlags()) return;

  if(twoBoards) { // count down secondary board's clocks as well
    activePartnerTime -= lastTickLength;
    partnerUp = 1;
    if(activePartner == 'W')
      DisplayWhiteClock(activePartnerTime, TRUE); // the counting clock is always the highlighted one!
    else
      DisplayBlackClock(activePartnerTime, TRUE);
    partnerUp = 0;
  }

  tickStartTM = now;
  intendedTickLength = NextTickLength( tRemaining - fudge) + fudge;
  StartClockTimer(intendedTickLength);

  /* if the time remaining has fallen below the alarm threshold, sound the
   * alarm. if the alarm has sounded and (due to a takeback or time control
   * with increment) the time remaining has increased to a level above the
   * threshold, reset the alarm so it can sound again.
   */

  if (appData.icsActive && appData.icsAlarm) {

    /* make sure we are dealing with the user's clock */
    if (!( ((gameMode == IcsPlayingWhite) && WhiteOnMove(currentMove)) ||
          ((gameMode == IcsPlayingBlack) && !WhiteOnMove(currentMove))
         )) return;

    if (alarmSounded && ( tRemaining > appData.icsAlarmTime)) {
      alarmSounded = FALSE;
    } else if (!alarmSounded && ( tRemaining <= appData.icsAlarmTime)) {
      PlayAlarmSound();
      alarmSounded = TRUE;
    }
  }
}


/* A player has just moved, so stop the previously running
   clock and (if in clock mode) start the other one.
   We redisplay both clocks in case we're in ICS mode, because
   ICS gives us an update to both clocks after every move.
   Note that this routine is called *after* forwardMostMove
   is updated, so the last fractional tick must be subtracted
   from the color that is *not* on move now.
   */
void SwitchClocks (int newMoveNr)
{
  long lastTickLength;
  TimeMark now;
  int flagged = FALSE;

  GetTimeMark(&now);

  if (StopClockTimer() && appData.clockMode) {
    lastTickLength = SubtractTimeMarks(&now, &tickStartTM);
    if (!WhiteOnMove(forwardMostMove)) {
      if(blackNPS >= 0) lastTickLength = 0;
      blackTimeRemaining -= lastTickLength;
      /* [HGM] PGNtime: save time for PGN file if engine did not give it */
      //         if(pvInfoList[forwardMostMove].time == -1)
      pvInfoList[forwardMostMove].time =               // use GUI time
        (timeRemaining[1][forwardMostMove-1] - blackTimeRemaining)/10;
    } else {
      if(whiteNPS >= 0) lastTickLength = 0;
      whiteTimeRemaining -= lastTickLength;
      /* [HGM] PGNtime: save time for PGN file if engine did not give it */
      //         if(pvInfoList[forwardMostMove].time == -1)
      pvInfoList[forwardMostMove].time =
        (timeRemaining[0][forwardMostMove-1] - whiteTimeRemaining)/10;
    }
    flagged = CheckFlags();
  }
  forwardMostMove = newMoveNr; // [HGM] race: change stm when no timer interrupt scheduled
  CheckTimeControl();

  if (flagged || !appData.clockMode) return;

  switch (gameMode) {
    case MachinePlaysBlack:
    case MachinePlaysWhite:
    case BeginningOfGame:
      if (pausing) return;
      break;

    case EditGame:
    case PlayFromGameFile:
    case IcsExamining:
      return;

    default:
      break;
  }

  if (searchTime) { // [HGM] st: set clock of player that has to move to max time
    if(WhiteOnMove(forwardMostMove))
      whiteTimeRemaining = 1000*searchTime / WhitePlayer()->timeOdds;
    else blackTimeRemaining = 1000*searchTime / WhitePlayer()->other->timeOdds;
  }

  tickStartTM = now;
  intendedTickLength = NextTickLength(WhiteOnMove(forwardMostMove) ?
      whiteTimeRemaining : blackTimeRemaining);
  StartClockTimer(intendedTickLength);
}


/* Stop both clocks */
void StopClocks ()
{
  long lastTickLength;
  TimeMark now;

  if (!StopClockTimer()) return;
  if (!appData.clockMode) return;

  GetTimeMark(&now);

  lastTickLength = SubtractTimeMarks(&now, &tickStartTM);
  if (WhiteOnMove(forwardMostMove)) {
    if(whiteNPS >= 0) lastTickLength = 0;
    whiteTimeRemaining -= lastTickLength;
    DisplayWhiteClock(whiteTimeRemaining, WhiteOnMove(currentMove));
  } else {
    if(blackNPS >= 0) lastTickLength = 0;
    blackTimeRemaining -= lastTickLength;
    DisplayBlackClock(blackTimeRemaining, !WhiteOnMove(currentMove));
  }
  CheckFlags();
}

/* Start clock of player on move.  Time may have been reset, so
   if clock is already running, stop and restart it. */
void StartClocks ()
{
  (void) StopClockTimer(); /* in case it was running already */
  DisplayBothClocks();
  if (CheckFlags()) return;

  if (!appData.clockMode) return;
  if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) return;

  GetTimeMark(&tickStartTM);
  intendedTickLength = NextTickLength(WhiteOnMove(forwardMostMove) ?
      whiteTimeRemaining : blackTimeRemaining);

  /* [HGM] nps: figure out nps factors, by determining which engine plays white and/or black once and for all */
  whiteNPS = blackNPS = -1;
  if(gameMode == MachinePlaysWhite || gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'w'
      || appData.zippyPlay && gameMode == IcsPlayingBlack) // first (perhaps only) engine has white
    whiteNPS = first.nps;
  if(gameMode == MachinePlaysBlack || gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'b'
      || appData.zippyPlay && gameMode == IcsPlayingWhite) // first (perhaps only) engine has black
    blackNPS = first.nps;
  if(gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'b') // second only used in Two-Machines mode
    whiteNPS = second.nps;
  if(gameMode == TwoMachinesPlay && first.twoMachinesColor[0] == 'w')
    blackNPS = second.nps;
  if(appData.debugMode) fprintf(debugFP, "nps: w=%d, b=%d\n", whiteNPS, blackNPS);

  StartClockTimer(intendedTickLength);
}

char * TimeString (long ms)
{
  long second, minute, hour, day;
  char *sign = "";
  static char buf[40], moveTime[8];

  if (ms > 0 && ms <= 9900) {
    /* convert milliseconds to tenths, rounding up */
    double tenths = floor( ((double)(ms + 99L)) / 100.00 );

    snprintf(buf,sizeof(buf)/sizeof(buf[0]), " %03.1f ", tenths/10.0);
    return buf;
  }

  /* convert milliseconds to seconds, rounding up */
  /* use floating point to avoid strangeness of integer division
     with negative dividends on many machines */
  second = (long) floor(((double) (ms + 999L)) / 1000.0);

  if (second < 0) {
    sign = "-";
    second = -second;
  }

  day = second / (60 * 60 * 24);
  second = second % (60 * 60 * 24);
  hour = second / (60 * 60);
  second = second % (60 * 60);
  minute = second / 60;
  second = second % 60;

  if(timeSuffix) snprintf(moveTime, 8, " (%d)", timeSuffix/1000); // [HGM] kludge alert; fraction contains move time
  else *moveTime = NULLCHAR;

  if (day > 0)
    snprintf(buf, sizeof(buf)/sizeof(buf[0]), " %s%ld:%02ld:%02ld:%02ld%s ",
        sign, day, hour, minute, second, moveTime);
  else if (hour > 0)
    snprintf(buf, sizeof(buf)/sizeof(buf[0]), " %s%ld:%02ld:%02ld%s ", sign, hour, minute, second, moveTime);
  else
    snprintf(buf, sizeof(buf)/sizeof(buf[0]), " %s%2ld:%02ld%s ", sign, minute, second, moveTime);

  return buf;
}


/*
 * This is necessary because some C libraries aren't ANSI C compliant yet.
 */
char * StrStr (char *string, char *match)
{
  int i, length;

  length = strlen(match);

  for (i = strlen(string) - length; i >= 0; i--, string++)
    if (!strncmp(match, string, length))
      return string;

  return NULL;
}

char * StrCaseStr (char *string, char *match)
{
  int i, j, length;

  length = strlen(match);

  for (i = strlen(string) - length; i >= 0; i--, string++) {
    for (j = 0; j < length; j++) {
      if (ToLower(match[j]) != ToLower(string[j]))
        break;
    }
    if (j == length) return string;
  }

  return NULL;
}

#ifndef _amigados
int StrCaseCmp (char *s1, char *s2)
{
  char c1, c2;

  for (;;) {
    c1 = ToLower(*s1++);
    c2 = ToLower(*s2++);
    if (c1 > c2) return 1;
    if (c1 < c2) return -1;
    if (c1 == NULLCHAR) return 0;
  }
}


int ToLower (int c)
{
  return isupper(c) ? tolower(c) : c;
}


int ToUpper (int c)
{
  return islower(c) ? toupper(c) : c;
}
#endif /* !_amigados	*/

char * StrSave (char *s)
{
  char *ret;

  if ((ret = (char *) malloc(strlen(s) + 1)))
  {
    safeStrCpy(ret, s, strlen(s)+1);
  }
  return ret;
}

char * StrSavePtr (char *s, char **savePtr)
{
  if (*savePtr) {
    free(*savePtr);
  }
  if ((*savePtr = (char *) malloc(strlen(s) + 1))) {
    safeStrCpy(*savePtr, s, strlen(s)+1);
  }
  return(*savePtr);
}

char * PGNDate ()
{
  time_t clock;
  struct tm *tm;
  char buf[MSG_SIZ];

  clock = time((time_t *)NULL);
  tm = localtime(&clock);
  snprintf(buf, MSG_SIZ, "%04d.%02d.%02d",
      tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday);
  return StrSave(buf);
}


char * PositionToFEN (int move, char *overrideCastling, int moveCounts)
{
  int i, j, fromX, fromY, toX, toY;
  int whiteToPlay, haveRights = nrCastlingRights;
  char buf[MSG_SIZ];
  char *p, *q;
  int emptycount;
  ChessSquare piece;

  whiteToPlay = (gameMode == EditPosition) ?
    !blackPlaysFirst : (move % 2 == 0);
  p = buf;

  /* Piece placement data */
  for (i = BOARD_HEIGHT - 1 - deadRanks; i >= 0; i--) {
    if(MSG_SIZ - (p - buf) < BOARD_RGHT - BOARD_LEFT + 20) { *p = 0; return StrSave(buf); }
    emptycount = 0;
    for (j = BOARD_LEFT; j < BOARD_RGHT; j++) {
      if (boards[move][i][j] == EmptySquare) {
        emptycount++;
      } else { ChessSquare piece = boards[move][i][j];
        if (emptycount > 0) {
          if(emptycount<10) /* [HGM] can be >= 10 */
            *p++ = '0' + emptycount;
          else { *p++ = '0' + emptycount/10; *p++ = '0' + emptycount%10; }
          emptycount = 0;
        }
        if(PieceToChar(piece) == '+') {
          /* [HGM] write promoted pieces as '+<unpromoted>' (Shogi) */
          *p++ = '+';
          piece = (ChessSquare)(CHUDEMOTED(piece));
        }
        *p++ = (piece == DarkSquare ? '*' : PieceToChar(piece));
        if(*p = PieceSuffix(piece)) p++;
        if(p[-1] == '~') {
          /* [HGM] flag promoted pieces as '<promoted>~' (Crazyhouse) */
          p[-1] = PieceToChar((ChessSquare)(CHUDEMOTED(piece)));
          *p++ = '~';
        }
      }
    }
    if (emptycount > 0) {
      if(emptycount<10) /* [HGM] can be >= 10 */
        *p++ = '0' + emptycount;
      else { *p++ = '0' + emptycount/10; *p++ = '0' + emptycount%10; }
      emptycount = 0;
    }
    *p++ = '/';
  }
  *(p - 1) = ' ';

  /* [HGM] print Crazyhouse or Shogi holdings */
  if( gameInfo.holdingsWidth ) {
    *(p-1) = '['; /* if we wanted to support BFEN, this could be '/' */
    q = p;
    for(i=0; i<gameInfo.holdingsSize; i++) { /* white holdings */
      piece = boards[move][i][BOARD_WIDTH-1];
      if( piece != EmptySquare )
        for(j=0; j<(int) boards[move][i][BOARD_WIDTH-2]; j++)
          *p++ = PieceToChar(piece);
    }
    for(i=0; i<gameInfo.holdingsSize; i++) { /* black holdings */
      piece = boards[move][BOARD_HEIGHT-i-1][0];
      if( piece != EmptySquare )
        for(j=0; j<(int) boards[move][BOARD_HEIGHT-i-1][1]; j++)
          *p++ = PieceToChar(piece);
    }

    if( q == p ) *p++ = '-';
    *p++ = ']';
    *p++ = ' ';
  }

  /* Active color */
  *p++ = whiteToPlay ? 'w' : 'b';
  *p++ = ' ';

  if(pieceDesc[WhiteKing] && strchr(pieceDesc[WhiteKing], 'i') && !strchr(pieceDesc[WhiteKing], 'O')) { // redefined without castling
    haveRights = 0; q = p;
    for(i=BOARD_RGHT-1; i>=BOARD_LEFT; i--) {
      piece = boards[move][0][i];
      if(piece >= WhitePawn && piece <= WhiteKing && pieceDesc[piece] && strchr(pieceDesc[piece], 'i')) { // piece with initial move
        if(!(boards[move][TOUCHED_W] & 1<<i)) *p++ = 'A' + i; // print file ID if it has not moved
      }
    }
    for(i=BOARD_RGHT-1; i>=BOARD_LEFT; i--) {
      piece = boards[move][BOARD_HEIGHT-1][i];
      if(piece >= BlackPawn && piece <= BlackKing && pieceDesc[piece] && strchr(pieceDesc[piece], 'i')) { // piece with initial move
        if(!(boards[move][TOUCHED_B] & 1<<i)) *p++ = 'a' + i; // print file ID if it has not moved
      }
    }
    if(p == q) *p++ = '-';
    *p++ = ' ';
  }

  if(q = overrideCastling) { // [HGM] FRC: override castling & e.p fields for non-compliant engines
    while(*p++ = *q++)
      ;
    if(q != overrideCastling+1) p[-1] = ' '; else --p;
  } else {
    if(haveRights) {
      int handW=0, handB=0;
      if(gameInfo.variant == VariantSChess) { // for S-Chess, all virgin backrank pieces must be listed
        for(i=0; i<BOARD_HEIGHT; i++) handW += boards[move][i][BOARD_RGHT]; // count white held pieces
        for(i=0; i<BOARD_HEIGHT; i++) handB += boards[move][i][BOARD_LEFT-1]; // count black held pieces
      }
      q = p;
      if(appData.fischerCastling) {
        if(handW) { // in shuffle S-Chess simply dump all virgin pieces
          for(i=BOARD_RGHT-1; i>=BOARD_LEFT; i--)
            if(boards[move][VIRGIN][i] & VIRGIN_W) *p++ = i + AAA + 'A' - 'a';
        } else {
          /* [HGM] write directly from rights */
          if(boards[move][CASTLING][2] != NoRights &&
              boards[move][CASTLING][0] != NoRights   )
            *p++ = boards[move][CASTLING][0] + AAA + 'A' - 'a';
          if(boards[move][CASTLING][2] != NoRights &&
              boards[move][CASTLING][1] != NoRights   )
            *p++ = boards[move][CASTLING][1] + AAA + 'A' - 'a';
        }
        if(handB) {
          for(i=BOARD_RGHT-1; i>=BOARD_LEFT; i--)
            if(boards[move][VIRGIN][i] & VIRGIN_B) *p++ = i + AAA;
        } else {
          if(boards[move][CASTLING][5] != NoRights &&
              boards[move][CASTLING][3] != NoRights   )
            *p++ = boards[move][CASTLING][3] + AAA;
          if(boards[move][CASTLING][5] != NoRights &&
              boards[move][CASTLING][4] != NoRights   )
            *p++ = boards[move][CASTLING][4] + AAA;
        }
      } else {

        /* [HGM] write true castling rights */
        if( nrCastlingRights == 6 ) {
          int q, k=0;
          if(boards[move][CASTLING][0] != NoRights &&
              boards[move][CASTLING][2] != NoRights  ) k = 1, *p++ = 'K';
          q = (boards[move][CASTLING][1] != NoRights &&
              boards[move][CASTLING][2] != NoRights  );
          if(handW) { // for S-Chess with pieces in hand, list virgin pieces between K and Q
            for(i=BOARD_RGHT-1-k; i>=BOARD_LEFT+q; i--)
              if((boards[move][0][i] != WhiteKing || k+q == 0) &&
                  boards[move][VIRGIN][i] & VIRGIN_W) *p++ = i + AAA + 'A' - 'a';
          }
          if(q) *p++ = 'Q';
          k = 0;
          if(boards[move][CASTLING][3] != NoRights &&
              boards[move][CASTLING][5] != NoRights  ) k = 1, *p++ = 'k';
          q = (boards[move][CASTLING][4] != NoRights &&
              boards[move][CASTLING][5] != NoRights  );
          if(handB) {
            for(i=BOARD_RGHT-1-k; i>=BOARD_LEFT+q; i--)
              if((boards[move][BOARD_HEIGHT-1][i] != BlackKing || k+q == 0) &&
                  boards[move][VIRGIN][i] & VIRGIN_B) *p++ = i + AAA;
          }
          if(q) *p++ = 'q';
        }
      }
      if (q == p) *p++ = '-'; /* No castling rights */
      *p++ = ' ';
    }

    if(gameInfo.variant != VariantShogi    && gameInfo.variant != VariantXiangqi &&
        gameInfo.variant != VariantShatranj && gameInfo.variant != VariantCourier &&
        gameInfo.variant != VariantMakruk   && gameInfo.variant != VariantASEAN ) {
      /* En passant target square */
      if (move > backwardMostMove) {
        fromX = moveList[move - 1][0] - AAA;
        fromY = moveList[move - 1][1] - ONE;
        toX = moveList[move - 1][2] - AAA;
        toY = moveList[move - 1][3] - ONE;
        if (fromY == (whiteToPlay ? BOARD_HEIGHT-2 : 1) &&
            toY == (whiteToPlay ? BOARD_HEIGHT-4 : 3) &&
            boards[move][toY][toX] == (whiteToPlay ? BlackPawn : WhitePawn) &&
            fromX == toX) {
          /* 2-square pawn move just happened */
          *p++ = toX + AAA;
          *p++ = whiteToPlay ? '6'+BOARD_HEIGHT-8 : '3';
        } else {
          *p++ = '-';
        }
      } else if(move == backwardMostMove) {
        // [HGM] perhaps we should always do it like this, and forget the above?
        if((signed char)boards[move][EP_STATUS] >= 0) {
          *p++ = boards[move][EP_STATUS] + AAA;
          *p++ = whiteToPlay ? '6'+BOARD_HEIGHT-8 : '3';
        } else {
          *p++ = '-';
        }
      } else {
        *p++ = '-';
      }
      *p++ = ' ';
    }
  }

  if(moveCounts)
  {   int i = 0, j=move;

    /* [HGM] find reversible plies */
    if (appData.debugMode) { int k;
      fprintf(debugFP, "write FEN 50-move: %d %d %d\n", initialRulePlies, forwardMostMove, backwardMostMove);
      for(k=backwardMostMove; k<=forwardMostMove; k++)
        fprintf(debugFP, "e%d. p=%d\n", k, (signed char)boards[k][EP_STATUS]);

    }

    while(j > backwardMostMove && (signed char)boards[j][EP_STATUS] <= EP_NONE) j--,i++;
    if( j == backwardMostMove ) i += initialRulePlies;
    sprintf(p, "%d ", i);
    p += i>=100 ? 4 : i >= 10 ? 3 : 2;

    /* Fullmove number */
    sprintf(p, "%d", (move / 2) + 1);
  } else *--p = NULLCHAR;

  return StrSave(buf);
}

Boolean ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
{
  int i, j, k, w=0, subst=0, shuffle=0, wKingRank = -1, bKingRank = -1;
  char *p, c;
  int emptycount, virgin[BOARD_FILES];
  ChessSquare piece, king = (gameInfo.variant == VariantKnightmate ? WhiteUnicorn : WhiteKing);

  p = fen;

  for(i=1; i<=deadRanks; i++) for(j=BOARD_LEFT; j<BOARD_RGHT; j++) board[BOARD_HEIGHT-i][j] = DarkSquare;

  /* Piece placement data */
  for (i = BOARD_HEIGHT - 1 - deadRanks; i >= 0; i--) {
    j = 0;
    for (;;) {
      if (*p == '/' || *p == ' ' || *p == '[' ) {
        if(j > w) w = j;
        emptycount = gameInfo.boardWidth - j;
        while (emptycount--)
          board[i][(j++)+gameInfo.holdingsWidth] = EmptySquare;
        if (*p == '/') p++;
        else if(autoSize && i != BOARD_HEIGHT-1) { // we stumbled unexpectedly into end of board
          for(k=i; k<BOARD_HEIGHT; k++) { // too few ranks; shift towards bottom
            for(j=0; j<BOARD_WIDTH; j++) board[k-i][j] = board[k][j];
          }
          appData.NrRanks = gameInfo.boardHeight - i; i=0;
        }
        break;
#if(BOARD_FILES >= 10)*0
      } else if(*p=='x' || *p=='X') { /* [HGM] X means 10 */
        p++; emptycount=10;
        if (j + emptycount > gameInfo.boardWidth) return FALSE;
        while (emptycount--)
          board[i][(j++)+gameInfo.holdingsWidth] = EmptySquare;
#endif
      } else if (*p == '*') {
        board[i][(j++)+gameInfo.holdingsWidth] = DarkSquare; p++;
      } else if (isdigit(*p)) {
        emptycount = *p++ - '0';
        while(isdigit(*p)) emptycount = 10*emptycount + *p++ - '0'; /* [HGM] allow > 9 */
        if (j + emptycount > gameInfo.boardWidth) return FALSE;
        while (emptycount--)
          board[i][(j++)+gameInfo.holdingsWidth] = EmptySquare;
      } else if (*p == '<') {
        if(i == BOARD_HEIGHT-1) shuffle = 1;
        else if (i != 0 || !shuffle) return FALSE;
        p++;
      } else if (shuffle && *p == '>') {
        p++; // for now ignore closing shuffle range, and assume rank-end
      } else if (*p == '?') {
        if (j >= gameInfo.boardWidth) return FALSE;
        if (i != 0  && i != BOARD_HEIGHT-1) return FALSE; // only on back-rank
        board[i][(j++)+gameInfo.holdingsWidth] = ClearBoard; p++; subst++; // placeHolder
      } else if (*p == '+' || isalpha(*p)) {
        char *q, *s = SUFFIXES;
        if (j >= gameInfo.boardWidth) return FALSE;
        if(*p=='+') {
          char c = *++p;
          if(q = strchr(s, p[1])) p++;
          piece = CharToPiece(c + (q ? 64*(q - s + 1) : 0));
          if(piece == EmptySquare) return FALSE; /* unknown piece */
          piece = (ChessSquare) (CHUPROMOTED(piece)); p++;
          if(PieceToChar(piece) != '+') return FALSE; /* unpromotable piece */
        } else {
          char c = *p++;
          if(q = strchr(s, *p)) p++;
          piece = CharToPiece(c + (q ? 64*(q - s + 1) : 0));
        }

        if(piece==EmptySquare) return FALSE; /* unknown piece */
        if(*p == '~') { /* [HGM] make it a promoted piece for Crazyhouse */
          piece = (ChessSquare) (PROMOTED(piece));
          if(PieceToChar(piece) != '~') return FALSE; /* cannot be a promoted piece */
          p++;
        }
        board[i][(j++)+gameInfo.holdingsWidth] = piece;
        if(piece == king) wKingRank = i;
        if(piece == WHITE_TO_BLACK king) bKingRank = i;
      } else {
        return FALSE;
      }
    }
  }
  while (*p == '/' || *p == ' ') p++;

  if(autoSize && w != 0) appData.NrFiles = w, InitPosition(TRUE);

  /* [HGM] by default clear Crazyhouse holdings, if present */
  if(gameInfo.holdingsWidth) {
    for(i=0; i<BOARD_HEIGHT; i++) {
      board[i][0]             = EmptySquare; /* black holdings */
      board[i][BOARD_WIDTH-1] = EmptySquare; /* white holdings */
      board[i][1]             = (ChessSquare) 0; /* black counts */
      board[i][BOARD_WIDTH-2] = (ChessSquare) 0; /* white counts */
    }
  }

  /* [HGM] look for Crazyhouse holdings here */
  while(*p==' ') p++;
  if( gameInfo.holdingsWidth && p[-1] == '/' || *p == '[') {
    int swap=0, wcnt=0, bcnt=0;
    if(*p == '[') p++;
    if(*p == '<') swap++, p++;
    if(*p == '-' ) p++; /* empty holdings */ else {
      if( !gameInfo.holdingsWidth ) return FALSE; /* no room to put holdings! */
      /* if we would allow FEN reading to set board size, we would   */
      /* have to add holdings and shift the board read so far here   */
      while( (piece = CharToPiece(*p) ) != EmptySquare ) {
        p++;
        if((int) piece >= (int) BlackPawn ) {
          i = (int)piece - (int)BlackPawn;
          i = PieceToNumber((ChessSquare)i);
          if( i >= gameInfo.holdingsSize ) return FALSE;
          board[BOARD_HEIGHT-1-i][0] = piece; /* black holdings */
          board[BOARD_HEIGHT-1-i][1]++;       /* black counts   */
          bcnt++;
        } else {
          i = (int)piece - (int)WhitePawn;
          i = PieceToNumber((ChessSquare)i);
          if( i >= gameInfo.holdingsSize ) return FALSE;
          board[i][BOARD_WIDTH-1] = piece;    /* white holdings */
          board[i][BOARD_WIDTH-2]++;          /* black holdings */
          wcnt++;
        }
      }
      if(subst) { // substitute back-rank question marks by holdings pieces
        for(j=BOARD_LEFT; j<BOARD_RGHT; j++) {
          int k, m, n = bcnt + 1;
          if(board[0][j] == ClearBoard) {
            if(!wcnt) return FALSE;
            n = rand() % wcnt;
            for(k=0, m=n; k<gameInfo.holdingsSize; k++) if((m -= board[k][BOARD_WIDTH-2]) < 0) {
              board[0][j] = board[k][BOARD_WIDTH-1]; wcnt--;
              if(--board[k][BOARD_WIDTH-2] == 0) board[k][BOARD_WIDTH-1] = EmptySquare;
              break;
            }
          }
          if(board[BOARD_HEIGHT-1][j] == ClearBoard) {
            if(!bcnt) return FALSE;
            if(n >= bcnt) n = rand() % bcnt; // use same randomization for black and white if possible
            for(k=0, m=n; k<gameInfo.holdingsSize; k++) if((n -= board[BOARD_HEIGHT-1-k][1]) < 0) {
              board[BOARD_HEIGHT-1][j] = board[BOARD_HEIGHT-1-k][0]; bcnt--;
              if(--board[BOARD_HEIGHT-1-k][1] == 0) board[BOARD_HEIGHT-1-k][0] = EmptySquare;
              break;
            }
          }
        }
        subst = 0;
      }
    }
    if(*p == ']') p++;
  }

  if(subst) return FALSE; // substitution requested, but no holdings

  while(*p == ' ') p++;

  /* Active color */
  c = *p++;
  if(appData.colorNickNames) {
    if( c == appData.colorNickNames[0] ) c = 'w'; else
      if( c == appData.colorNickNames[1] ) c = 'b';
  }
  switch (c) {
    case 'w':
      *blackPlaysFirst = FALSE;
      break;
    case 'b':
      *blackPlaysFirst = TRUE;
      break;
    default:
      return FALSE;
  }

  /* [HGM] We NO LONGER ignore the rest of the FEN notation */
  /* return the extra info in global variiables             */

  while(*p==' ') p++;

  if(!isdigit(*p) && *p != '-') { // we seem to have castling rights. Make sure they are on the rank the King actually is.
    if(wKingRank >= 0) for(i=0; i<3; i++) castlingRank[i] = wKingRank;
    if(bKingRank >= 0) for(i=3; i<6; i++) castlingRank[i] = bKingRank;
  }

  /* set defaults in case FEN is incomplete */
  board[EP_STATUS] = EP_UNKNOWN;
  board[TOUCHED_W] = board[TOUCHED_B] = 0;
  for(i=0; i<nrCastlingRights; i++ ) {
    board[CASTLING][i] =
      appData.fischerCastling ? NoRights : initialRights[i];
  }   /* assume possible unless obviously impossible */
  if(initialRights[0]!=NoRights && board[castlingRank[0]][initialRights[0]] != WhiteRook) board[CASTLING][0] = NoRights;
  if(initialRights[1]!=NoRights && board[castlingRank[1]][initialRights[1]] != WhiteRook) board[CASTLING][1] = NoRights;
  if(initialRights[2]!=NoRights && board[castlingRank[2]][initialRights[2]] != WhiteUnicorn
      && board[castlingRank[2]][initialRights[2]] != WhiteKing) board[CASTLING][2] = NoRights;
  if(initialRights[3]!=NoRights && board[castlingRank[3]][initialRights[3]] != BlackRook) board[CASTLING][3] = NoRights;
  if(initialRights[4]!=NoRights && board[castlingRank[4]][initialRights[4]] != BlackRook) board[CASTLING][4] = NoRights;
  if(initialRights[5]!=NoRights && board[castlingRank[5]][initialRights[5]] != BlackUnicorn
      && board[castlingRank[5]][initialRights[5]] != BlackKing) board[CASTLING][5] = NoRights;
  FENrulePlies = 0;

  if(pieceDesc[WhiteKing] && strchr(pieceDesc[WhiteKing], 'i') && !strchr(pieceDesc[WhiteKing], 'O')) { // redefined without castling
    char *q = p;
    int w=0, b=0;
    while(isalpha(*p)) {
      if(isupper(*p)) w |= 1 << (*p++ - 'A');
      if(islower(*p)) b |= 1 << (*p++ - 'a');
    }
    if(*p == '-') p++;
    if(p != q) {
      board[TOUCHED_W] = ~w;
      board[TOUCHED_B] = ~b;
      while(*p == ' ') p++;
    }
  } else

    if(nrCastlingRights) {
      int fischer = 0;
      if(gameInfo.variant == VariantSChess) for(i=0; i<BOARD_FILES; i++) virgin[i] = 0;
      if(*p >= 'A' && *p <= 'Z' || *p >= 'a' && *p <= 'z' || *p=='-') {
        /* castling indicator present, so default becomes no castlings */
        for(i=0; i<nrCastlingRights; i++ ) {
          board[CASTLING][i] = NoRights;
        }
      }
      while(*p=='K' || *p=='Q' || *p=='k' || *p=='q' || *p=='-' ||
          (appData.fischerCastling || gameInfo.variant == VariantSChess) &&
          ( *p >= 'a' && *p < 'a' + gameInfo.boardWidth) ||
          ( *p >= 'A' && *p < 'A' + gameInfo.boardWidth)   ) {
        int c = *p++, whiteKingFile=NoRights, blackKingFile=NoRights;

        for(i=BOARD_LEFT; i<BOARD_RGHT; i++) {
          if(board[castlingRank[5]][i] == BlackKing) blackKingFile = i;
          if(board[castlingRank[2]][i] == WhiteKing) whiteKingFile = i;
        }
        if(gameInfo.variant == VariantTwoKings || gameInfo.variant == VariantKnightmate)
          whiteKingFile = blackKingFile = BOARD_WIDTH >> 1; // for these variant scanning fails
        if(whiteKingFile == NoRights || board[castlingRank[2]][whiteKingFile] != WhiteUnicorn
            && board[castlingRank[2]][whiteKingFile] != WhiteKing) whiteKingFile = NoRights;
        if(blackKingFile == NoRights || board[castlingRank[5]][blackKingFile] != BlackUnicorn
            && board[castlingRank[5]][blackKingFile] != BlackKing) blackKingFile = NoRights;
        switch(c) {
          case'K':
            for(i=BOARD_RGHT-1; board[castlingRank[2]][i]!=WhiteRook && i>whiteKingFile; i--);
            board[CASTLING][0] = i != whiteKingFile ? i : NoRights;
            board[CASTLING][2] = whiteKingFile;
            if(board[CASTLING][0] != NoRights) virgin[board[CASTLING][0]] |= VIRGIN_W;
            if(board[CASTLING][2] != NoRights) virgin[board[CASTLING][2]] |= VIRGIN_W;
            if(whiteKingFile != BOARD_WIDTH>>1|| i != BOARD_RGHT-1) fischer = 1;
            break;
          case'Q':
            for(i=BOARD_LEFT;  i<BOARD_RGHT && board[castlingRank[2]][i]!=WhiteRook && i<whiteKingFile; i++);
            board[CASTLING][1] = i != whiteKingFile ? i : NoRights;
            board[CASTLING][2] = whiteKingFile;
            if(board[CASTLING][1] != NoRights) virgin[board[CASTLING][1]] |= VIRGIN_W;
            if(board[CASTLING][2] != NoRights) virgin[board[CASTLING][2]] |= VIRGIN_W;
            if(whiteKingFile != BOARD_WIDTH>>1|| i != BOARD_LEFT) fischer = 1;
            break;
          case'k':
            for(i=BOARD_RGHT-1; board[castlingRank[5]][i]!=BlackRook && i>blackKingFile; i--);
            board[CASTLING][3] = i != blackKingFile ? i : NoRights;
            board[CASTLING][5] = blackKingFile;
            if(board[CASTLING][3] != NoRights) virgin[board[CASTLING][3]] |= VIRGIN_B;
            if(board[CASTLING][5] != NoRights) virgin[board[CASTLING][5]] |= VIRGIN_B;
            if(blackKingFile != BOARD_WIDTH>>1|| i != BOARD_RGHT-1) fischer = 1;
            break;
          case'q':
            for(i=BOARD_LEFT; i<BOARD_RGHT && board[castlingRank[5]][i]!=BlackRook && i<blackKingFile; i++);
            board[CASTLING][4] = i != blackKingFile ? i : NoRights;
            board[CASTLING][5] = blackKingFile;
            if(board[CASTLING][4] != NoRights) virgin[board[CASTLING][4]] |= VIRGIN_B;
            if(board[CASTLING][5] != NoRights) virgin[board[CASTLING][5]] |= VIRGIN_B;
            if(blackKingFile != BOARD_WIDTH>>1|| i != BOARD_LEFT) fischer = 1;
          case '-':
            break;
          default: /* FRC castlings */
            if(c >= 'a') { /* black rights */
              if(gameInfo.variant == VariantSChess) { virgin[c-AAA] |= VIRGIN_B; break; } // in S-Chess castlings are always kq, so just virginity
              for(i=BOARD_LEFT; i<BOARD_RGHT; i++)
                if(board[BOARD_HEIGHT-1][i] == BlackKing) break;
              if(i == BOARD_RGHT) break;
              board[CASTLING][5] = i;
              c -= AAA;
              if(board[BOARD_HEIGHT-1][c] <  BlackPawn ||
                  board[BOARD_HEIGHT-1][c] >= BlackKing   ) break;
              if(c > i)
                board[CASTLING][3] = c;
              else
                board[CASTLING][4] = c;
            } else { /* white rights */
              if(gameInfo.variant == VariantSChess) { virgin[c-AAA-'A'+'a'] |= VIRGIN_W; break; } // in S-Chess castlings are always KQ
              for(i=BOARD_LEFT; i<BOARD_RGHT; i++)
                if(board[0][i] == WhiteKing) break;
              if(i == BOARD_RGHT) break;
              board[CASTLING][2] = i;
              c -= AAA - 'a' + 'A';
              if(board[0][c] >= WhiteKing) break;
              if(c > i)
                board[CASTLING][0] = c;
              else
                board[CASTLING][1] = c;
            }
        }
      }
      for(i=0; i<nrCastlingRights; i++)
        if(board[CASTLING][i] != NoRights) initialRights[i] = board[CASTLING][i];
      if(gameInfo.variant == VariantSChess)
        for(i=0; i<BOARD_FILES; i++) board[VIRGIN][i] = shuffle ? VIRGIN_W | VIRGIN_B : virgin[i]; // when shuffling assume all virgin
      if(fischer && shuffle) appData.fischerCastling = TRUE;
      if (appData.debugMode) {
        fprintf(debugFP, "FEN castling rights:");
        for(i=0; i<nrCastlingRights; i++)
          fprintf(debugFP, " %d", board[CASTLING][i]);
        fprintf(debugFP, "\n");
      }

      while(*p==' ') p++;
    }

  if(shuffle) SetUpShuffle(board, appData.defaultFrcPosition);

  /* read e.p. field in games that know e.p. capture */
  if(gameInfo.variant != VariantShogi    && gameInfo.variant != VariantXiangqi &&
      gameInfo.variant != VariantShatranj && gameInfo.variant != VariantCourier &&
      gameInfo.variant != VariantMakruk && gameInfo.variant != VariantASEAN ) {
    if(*p=='-') {
      p++; board[EP_STATUS] = EP_NONE;
    } else {
      char c = *p++ - AAA;

      if(c < BOARD_LEFT || c >= BOARD_RGHT) return TRUE;
      if(*p >= '0' && *p <='9') p++;
      board[EP_STATUS] = c;
    }
  }


  if(sscanf(p, "%d", &i) == 1) {
    FENrulePlies = i; /* 50-move ply counter */
    /* (The move number is still ignored)    */
  }

  return TRUE;
}

void EditPositionPasteFEN (char *fen)
{
  if (fen != NULL) {
    Board initial_position;

    if (!ParseFEN(initial_position, &blackPlaysFirst, fen, TRUE)) {
      DisplayError(_("Bad FEN position in clipboard"), 0);
      return ;
    } else {
      int savedBlackPlaysFirst = blackPlaysFirst;
      EditPositionEvent();
      blackPlaysFirst = savedBlackPlaysFirst;
      CopyBoard(boards[0], initial_position);
      initialRulePlies = FENrulePlies; /* [HGM] copy FEN attributes as well */
      EditPositionDone(FALSE); // [HGM] fake: do not fake rights if we had FEN
      DisplayBothClocks();
      DrawPosition(FALSE, boards[currentMove]);
    }
  }
}

static char cseq[12] = "\\   ";

Boolean set_cont_sequence (char *new_seq)
{
  int len;
  Boolean ret;

  // handle bad attempts to set the sequence
  if (!new_seq)
    return 0; // acceptable error - no debug

  len = strlen(new_seq);
  ret = (len > 0) && (len < sizeof(cseq));
  if (ret)
    safeStrCpy(cseq, new_seq, sizeof(cseq)/sizeof(cseq[0]));
  else if (appData.debugMode)
    fprintf(debugFP, "Invalid continuation sequence \"%s\"  (maximum length is: %u)\n", new_seq, (unsigned) sizeof(cseq)-1);
  return ret;
}

/*
   reformat a source message so words don't cross the width boundary.  internal
   newlines are not removed.  returns the wrapped size (no null character unless
   included in source message).  If dest is NULL, only calculate the size required
   for the dest buffer.  lp argument indicats line position upon entry, and it's
   passed back upon exit.
   */
int wrap (char *dest, char *src, int count, int width, int *lp)
{
  int len, i, ansi, cseq_len, line, old_line, old_i, old_len, clen;

  cseq_len = strlen(cseq);
  old_line = line = *lp;
  ansi = len = clen = 0;

  for (i=0; i < count; i++)
  {
    if (src[i] == '\033')
      ansi = 1;

    // if we hit the width, back up
    if (!ansi && (line >= width) && src[i] != '\n' && src[i] != ' ')
    {
      // store i & len in case the word is too long
      old_i = i, old_len = len;

      // find the end of the last word
      while (i && src[i] != ' ' && src[i] != '\n')
      {
        i--;
        len--;
      }

      // word too long?  restore i & len before splitting it
      if ((old_i-i+clen) >= width)
      {
        i = old_i;
        len = old_len;
      }

      // extra space?
      if (i && src[i-1] == ' ')
        len--;

      if (src[i] != ' ' && src[i] != '\n')
      {
        i--;
        if (len)
          len--;
      }

      // now append the newline and continuation sequence
      if (dest)
        dest[len] = '\n';
      len++;
      if (dest)
        strncpy(dest+len, cseq, cseq_len);
      len += cseq_len;
      line = cseq_len;
      clen = cseq_len;
      continue;
    }

    if (dest)
      dest[len] = src[i];
    len++;
    if (!ansi)
      line++;
    if (src[i] == '\n')
      line = 0;
    if (src[i] == 'm')
      ansi = 0;
  }
  if (dest && appData.debugMode)
  {
    fprintf(debugFP, "wrap(count:%d,width:%d,line:%d,len:%d,*lp:%d,src: ",
        count, width, line, len, *lp);
    show_bytes(debugFP, src, count);
    fprintf(debugFP, "\ndest: ");
    show_bytes(debugFP, dest, len);
    fprintf(debugFP, "\n");
  }
  *lp = dest ? line : old_line;

  return len;
}

// [HGM] vari: routines for shelving variations
Boolean modeRestore = FALSE;

void PushInner (int firstMove, int lastMove)
{
  int i, j, nrMoves = lastMove - firstMove;

  // push current tail of game on stack
  savedResult[storedGames] = gameInfo.result;
  savedDetails[storedGames] = gameInfo.resultDetails;
  gameInfo.resultDetails = NULL;
  savedFirst[storedGames] = firstMove;
  savedLast [storedGames] = lastMove;
  savedFramePtr[storedGames] = framePtr;
  framePtr -= nrMoves; // reserve space for the boards
  for(i=nrMoves; i>=1; i--) { // copy boards to stack, working downwards, in case of overlap
    CopyBoard(boards[framePtr+i], boards[firstMove+i]);
    for(j=0; j<MOVE_LEN; j++)
      moveList[framePtr+i][j] = moveList[firstMove+i-1][j];
    for(j=0; j<2*MOVE_LEN; j++)
      parseList[framePtr+i][j] = parseList[firstMove+i-1][j];
    timeRemaining[0][framePtr+i] = timeRemaining[0][firstMove+i];
    timeRemaining[1][framePtr+i] = timeRemaining[1][firstMove+i];
    pvInfoList[framePtr+i] = pvInfoList[firstMove+i-1];
    pvInfoList[firstMove+i-1].depth = 0;
    commentList[framePtr+i] = commentList[firstMove+i];
    commentList[firstMove+i] = NULL;
  }

  storedGames++;
  forwardMostMove = firstMove; // truncate game so we can start variation
}

void PushTail (int firstMove, int lastMove)
{
  if(appData.icsActive) { // only in local mode
    forwardMostMove = currentMove; // mimic old ICS behavior
    return;
  }
  if(storedGames >= MAX_VARIATIONS-2) return; // leave one for PV-walk

  PushInner(firstMove, lastMove);
  if(storedGames == 1) GreyRevert(FALSE);
  if(gameMode == PlayFromGameFile) gameMode = EditGame, modeRestore = TRUE;
}

void PopInner (Boolean annotate)
{
  int i, j, nrMoves;
  char buf[8000], moveBuf[20];

  ToNrEvent(savedFirst[storedGames-1]); // sets currentMove
  storedGames--; // do this after ToNrEvent, to make sure HistorySet will refresh entire game after PopInner returns
  nrMoves = savedLast[storedGames] - currentMove;
  if(annotate) {
    int cnt = 10;
    if(!WhiteOnMove(currentMove))
      snprintf(buf, sizeof(buf)/sizeof(buf[0]),"(%d...", (currentMove+2)>>1);
    else safeStrCpy(buf, "(", sizeof(buf)/sizeof(buf[0]));
    for(i=currentMove; i<forwardMostMove; i++) {
      if(WhiteOnMove(i))
        snprintf(moveBuf, sizeof(moveBuf)/sizeof(moveBuf[0]), " %d. %s", (i+2)>>1, SavePart(parseList[i]));
      else snprintf(moveBuf, sizeof(moveBuf)/sizeof(moveBuf[0])," %s", SavePart(parseList[i]));
      strcat(buf, moveBuf);
      if(commentList[i]) { strcat(buf, " "); strcat(buf, commentList[i]); }
      if(!--cnt) { strcat(buf, "\n"); cnt = 10; }
    }
    strcat(buf, ")");
  }
  for(i=1; i<=nrMoves; i++) { // copy last variation back
    CopyBoard(boards[currentMove+i], boards[framePtr+i]);
    for(j=0; j<MOVE_LEN; j++)
      moveList[currentMove+i-1][j] = moveList[framePtr+i][j];
    for(j=0; j<2*MOVE_LEN; j++)
      parseList[currentMove+i-1][j] = parseList[framePtr+i][j];
    timeRemaining[0][currentMove+i] = timeRemaining[0][framePtr+i];
    timeRemaining[1][currentMove+i] = timeRemaining[1][framePtr+i];
    pvInfoList[currentMove+i-1] = pvInfoList[framePtr+i];
    if(commentList[currentMove+i]) free(commentList[currentMove+i]);
    commentList[currentMove+i] = commentList[framePtr+i];
    commentList[framePtr+i] = NULL;
  }
  if(annotate) AppendComment(currentMove+1, buf, FALSE);
  framePtr = savedFramePtr[storedGames];
  gameInfo.result = savedResult[storedGames];
  if(gameInfo.resultDetails != NULL) {
    free(gameInfo.resultDetails);
  }
  gameInfo.resultDetails = savedDetails[storedGames];
  forwardMostMove = currentMove + nrMoves;
}

Boolean PopTail (Boolean annotate)
{
  if(appData.icsActive) return FALSE; // only in local mode
  if(!storedGames) return FALSE; // sanity
  CommentPopDown(); // make sure no stale variation comments to the destroyed line can remain open

  PopInner(annotate);
  if(currentMove < forwardMostMove) ForwardEvent(); else
    HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);

  if(storedGames == 0) { GreyRevert(TRUE); if(modeRestore) modeRestore = FALSE, gameMode = PlayFromGameFile; }
  return TRUE;
}

void CleanupTail ()
{	// remove all shelved variations
  int i;
  for(i=0; i<storedGames; i++) {
    if(savedDetails[i])
      free(savedDetails[i]);
    savedDetails[i] = NULL;
  }
  for(i=framePtr; i<MAX_MOVES; i++) {
    if(commentList[i]) free(commentList[i]);
    commentList[i] = NULL;
  }
  framePtr = MAX_MOVES-1;
  storedGames = 0;
}

void LoadVariation (int index, char *text)
{       // [HGM] vari: shelve previous line and load new variation, parsed from text around text[index]
  char *p = text, *start = NULL, *end = NULL, wait = NULLCHAR;
  int level = 0, move;

  if(gameMode != EditGame && gameMode != AnalyzeMode && gameMode != PlayFromGameFile) return;
  // first find outermost bracketing variation
  while(*p) { // hope I got this right... Non-nesting {} and [] can screen each other and nesting ()
    if(!wait) { // while inside [] pr {}, ignore everyting except matching closing
      if(*p == '{') wait = '}';
      else if(*p == '[') wait = ']';
      else if(*p == '(' && level++ == 0 && p-text < index) start = p+1;
      if(*p == ')' && level > 0 && --level == 0 && p-text > index && end == NULL) end = p-1;
    }
    if(*p == wait) wait = NULLCHAR; // closing found
    p++;
  }
  if(!start || !end) return; // no variation found, or syntax error in PGN: ignore click
  if(appData.debugMode) fprintf(debugFP, "at move %d load variation '%s'\n", currentMove, start);
  end[1] = NULLCHAR; // clip off comment beyond variation
  ToNrEvent(currentMove-1);
  PushTail(currentMove, forwardMostMove); // shelve main variation. This truncates game
  // kludge: use ParsePV() to append variation to game
  move = currentMove;
  ParsePV(start, TRUE, TRUE);
  forwardMostMove = endPV; endPV = -1; currentMove = move; // cleanup what ParsePV did
  ClearPremoveHighlights();
  // CommentPopDown();
  ToNrEvent(currentMove+1);
}

int transparency[2];

void LoadTheme ()
{
#define BUF_SIZ (2*MSG_SIZ)
  char *p, *q, buf[BUF_SIZ];
  if(engineLine && engineLine[0]) { // a theme was selected from the listbox
    snprintf(buf, BUF_SIZ, "-theme %s", engineLine);
    ParseArgsFromString(buf);
    ActivateTheme(TRUE); // also redo colors
    return;
  }
  p = nickName;
  if(*p && !strchr(p, '"')) // theme name specified and well-formed; add settings to theme list
  {
    int len;
    q = appData.themeNames;
    snprintf(buf, BUF_SIZ, "\"%s\"", nickName);
    if(appData.useBitmaps) {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -ubt true -lbtf \"%s\"",
          Shorten(appData.liteBackTextureFile));
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -dbtf \"%s\" -lbtm %d -dbtm %d",
          Shorten(appData.darkBackTextureFile),
          appData.liteBackTextureMode,
          appData.darkBackTextureMode );
    } else {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -ubt false");
    }
    if(!appData.useBitmaps || transparency[0]) {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -lsc %s", Col2Text(2) ); // lightSquareColor
    }
    if(!appData.useBitmaps || transparency[1]) {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -dsc %s", Col2Text(3) ); // darkSquareColor
    }
    if(appData.useBorder) {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -ub true -border \"%s\"",
          appData.border);
    } else {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -ub false");
    }
    if(appData.useFont) {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -upf true -pf \"%s\" -fptc \"%s\" -fpfcw %s -fpbcb %s",
          appData.renderPiecesWithFont,
          appData.fontToPieceTable,
          Col2Text(9),    // appData.fontBackColorWhite
          Col2Text(10) ); // appData.fontForeColorBlack
    } else {
      snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -upf false");
      if(appData.pieceDirectory[0]) {
        snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -pid \"%s\"", Shorten(appData.pieceDirectory));
        if(appData.trueColors != 2) // 2 is a kludge to suppress this in WinBoard
          snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -trueColors %s", appData.trueColors ? "true" : "false");
      }
      if(!appData.pieceDirectory[0] || !appData.trueColors)
        snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -wpc %s -bpc %s",
            Col2Text(0),   // whitePieceColor
            Col2Text(1) ); // blackPieceColor
    }
    snprintf(buf+strlen(buf), BUF_SIZ-strlen(buf), " -hsc %s -phc %s\n",
        Col2Text(4),   // highlightSquareColor
        Col2Text(5) ); // premoveHighlightColor
    appData.themeNames = malloc(len = strlen(q) + strlen(buf) + 1);
    if(insert != q) insert[-1] = NULLCHAR;
    snprintf(appData.themeNames, len, "%s\n%s%s", q, buf, insert);
    if(q) 	free(q);
  }
  ActivateTheme(FALSE);
}
